An acid donates a proton to form its ________ , which therefore has one less _______ , and one more _______ than its acid.
conjugate base, hydrogen atom, negative charge

Answers

Answer 1

An acid donates a proton to form its conjugate base, which therefore has one less hydrogen atom and one more negative charge than its acid. The strength of an acid depends on its ability to donate a proton to form its conjugate base. The weaker the acid, the stronger the conjugate base, and the stronger the acid, the weaker the conjugate

base.The conjugate base of a strong acid is weak because it has a very low ability to accept another proton since it is already carrying a negative charge. A weak acid has a strong conjugate base since it has a high ability to accept

another proton. Thus, an acid and its conjugate base are related to each other in terms of their ability to donate or accept a proton. For example, hydrochloric acid (HCl) dissociates in water to form H+ and Cl-. Its conjugate base is

chloride (Cl-) which is strong since it cannot accept another proton to form HCl again.

For more similar questions on topic Acid-base chemistry.

https://brainly.com/question/22101058

#SPJ11


Related Questions

in this experiment, you will use universal indicator to qualitatively measure ph. the universal indicator in this experiment is a mixture of 4 common indicators allowing for a large ph range to be measured. the following table (also available in your lab manual) describes the individual components of our universal indicator. universal indicator components indicator low ph color transition ph range high ph color thymol blue (1st transition) red 1.2 - 2.8 yellow methyl red red 4.4 - 6.2 yellow bromothymol blue yellow 6.0 - 7.6 blue thymol blue (2nd transition) yellow 8.0 - 9.6 blue phenolphthalein colorless 8.3 - 10.0 fuchsia select all of the following statements that are true about the universal indicator. group of answer choices at ph 1.2, the indicator will appear red. the universal indicator is a single chemical compound. the universal indicator (or parts thereof) are in equilibrium and have an associated k value. at a ph 7, the indicator will appear colorless.

Answers

At PH 1.2, the indicator will appear red.

Universal indicator- The universal indicator is a mixture of 4 common indicators allowing for a large pH range to be measured.

At pH 7, the indicator will appear yellow due to bromothymol blue. The universal indicator (or parts thereof) are in equilibrium and have an associated K value.

K value- The K value indicates the amount of products and reactants present in the reaction. It is an equilibrium ratio of the concentration of products and the reactants.

A universal indicator is made by mixing bromomethyl, methyl orange and phenolpthalein in alcohol.

To learn more about "universal indicator", visit: https://brainly.com/question/2953080

#SPJ11

equal masses of two substances absorb the same amount of heat. the temperature of substance a increases twice as much as the temperature of substance b. which substance has the higher specific heat?

Answers

The substance with the higher specific heat is Substance B. Specific heat is the amount of energy required to raise the temperature of a unit mass of a substance by one degree Celsius.

What is the substance with higher specific heat?

Since equal masses of two substances absorb the same amount of heat, the substance with the higher specific heat will require more energy to raise its temperature by one degree Celsius, meaning that it will experience a smaller increase in temperature when the same amount of heat is applied. In this case, since Substance A's temperature increased twice as much as Substance B's, Substance B has the higher specific heat.

When two substances have the same mass and absorb the same amount of heat energy, the substance with the lower specific heat will have a higher temperature increase. Therefore, if the temperature of substance A increases twice as much as the temperature of substance B, it means that the specific heat of substance A is lower than the specific heat of substance B.

The formula for specific heat is given as follows:

Q = mcΔT

where, Q is the amount of heat energy added or removed, m is the mass of the substance, c is the specific heat of the substanceΔT is the change in temperature.

Therefore, if Q and m are the same for both substances, then the ratio of their temperature changes is given by:

ΔTA/ΔTB = cB/cA

Since the temperature of substance A increased twice as much as substance B, it means that ΔTA = 2ΔTB. Therefore, we can substitute these values in the above formula and get:

2 = cB/cA⇒ cA = cB/2

Since the specific heat of substance A is half of the specific heat of substance B, it means that substance A has a lower specific heat as compared to substance B.

Read more about the temperature here:

https://brainly.com/question/24746268

#SPJ11

Dolostone is composed of the mineral dolomite, which is similar to calcite in limestone, except that dolomite contains_____
a. Iron
b. Aluminium
c. Silica
d. Magnesium

Answers

Dolostone is composed of the mineral dolomite, which is similar to calcite in limestone, except that dolomite contains magnesium.

Dolostone, also known as dolomite rock, is a sedimentary rock composed mainly of the mineral dolomite. Dolomite, a calcium magnesium carbonate mineral, is the primary component of dolostone, making up around 90-95 percent of the rock. Dolostone is a rock that is similar to limestone and is often mistaken for it.

Read more about the topic of carbonate rocks:

https://brainly.com/question/12971138

#SPJ11

Activity 2: Who's My Family? A fire has occurred in a nearby maternity clinic. The assigned nurse quickly rushed out of the place to secure the newly born babies. Unfortunately, there were some babies without their identification bracelets. Using your knowledge about codominance inheritance will help bring these babies back to their correct parents. ​

Answers

Codominance is a type of inheritance pattern in which both alleles of a gene are expressed equally in the phenotype of the individual. This means that if a baby inherits two different alleles for a particular trait, both will be expressed in the baby's physical appearance.

In the case of the missing identification bracelets, the nurse could use the principle of codominance to help identify the babies and return them to their correct parents. For example, if one baby has a parent with blood type A and the other has a parent with blood type B, and both babies have blood type AB due to codominance, then the nurse could match the babies with their correct parents based on their blood type.

Similarly, if there are other observable traits that exhibit codominance, such as eye color or skin tone, the nurse could use these to help identify the babies and return them to their correct parents. By understanding and applying the principles of codominance inheritance, the nurse could help ensure that each baby is reunited with their rightful family.

To learn more about  inheritance  refer to:

brainly.com/question/14930526

#SPJ4

Predict the product(s) obtained when benzoquinone is treated with excess butadiene:

Answers

When benzoquinone is treated with excess butadiene, the products obtained are 2,5-dimethylcyclohexadiene-1,4-dione and cyclohexene.

What is benzoquinone?

Benzoquinone is also known as 1,4-benzoquinone or cyclohexa-2,5-diene-1,4-dione, is a colorless organic compound. The presence of two carbonyl groups in its structure provides it its characteristic quinone chemistry.

Butadiene, also known as 1,3-butadiene, is a conjugated diene. The reaction between benzoquinone and butadiene is called a Diels-Alder reaction.

The Diels-Alder reaction is a conjugate addition reaction that joins a diene and a dienophile to create a new six-membered ring. The most important characteristic of the Diels-Alder reaction is its stereospecificity. This reaction occurs between a cyclic diene and an alkene or alkyne dienophile.

The products obtained when benzoquinone is treated with excess butadiene are:2,5-dimethylcyclohexadiene-1,4-dioneCyclohexeneThe reaction proceeds with the dienophile (benzoquinone) being attacked by the diene (butadiene) in the Diels-Alder reaction to produce a cyclic adduct. The product is 2,5-dimethylcyclohexadiene-1,4-dione. Cyclohexene is formed as a byproduct of the reaction.

Learn more about Benzoquinone here:

https://brainly.com/question/15014857

#SPJ11

which statement is true about chemical equilibrium constant keq? group of answer choices A. a keq larger than 1 means the reaction favors toward the reactant side. B. a large keq means the reaction rate is very fast. C. for a specific reaction at a fixed temperature, there can be more than one keq value. D. a keq larger than 1 means the reaction favors toward the product side. E. to calculate keq, we can use the initial concentration to calculate the value.

Answers

The statement that is true about the chemical equilibrium constant K eq is: A K eq larger than 1 means the reaction favors toward the product side.

When a chemical reaction occurs, it does not continue indefinitely; rather, it reaches a point at which the forward and reverse reactions occur at the same rate, and this is referred to as chemical equilibrium.

Chemical equilibrium refers to the point at which a reaction has reached a point at which the concentrations of the reactants and products no longer change over time,

implying that the forward and reverse reactions are occurring at the same rate.

K eq = ([C]^c[D]^d)/([A]^a[B]^b)

Where [A], [B], [C], and [D] represent the concentrations of the reactants and products, respectively, and a, b, c, and d represent the stoichiometric coefficients of the reactants and products.

The K eq value is a measure of the degree to which a reaction is likely to proceed.

The magnitude of the K eq value provides information about the position of the equilibrium, the extent of the reaction, and the relative concentration of reactants and products.

A K eq value greater than 1 indicates that the reaction is favored in the forward direction (product formation) at equilibrium,

whereas a K eq value less than 1 indicates that the reaction is favored in the reverse direction (reactant formation).

A K eq value of 1 indicates that the reactants and products are present in roughly equal proportions at equilibrium.

to know more about equilibrium refer here:

https://brainly.com/question/30807709#

#SPJ11

how many years does it take for plastic to decompose

Answers

Answer: how many years does it take for plastic to decompose?

Well, it depends on the plastic,  regular plastic can take up to 20 years to decompose, however, plastic bottles can take up to 450 years to decompose.

What is the purpose of the one balloon larger in size than the other balloons? o to represent unoccupied space in a molecule to represent any pair of electrons - bonding or lone pair to represent the space lone pairs occupy in a molecule Submit Request Answer

Answers

The balloon that is one size larger than the others serves to symbolise the area in a molecule inhabited by lone pairs of electrons, signifying unshared electron pairs in a particular region.

The Lewis structure is a chemical model that depicts how atoms and valence electrons are arranged in a molecule. The atoms are represented by symbols, and the valence electrons, which are the electrons at the highest energy level, are shown as dots or lines. In organic chemistry, the bigger balloon often designates a region of a molecule where electrons are not shared with any other atoms or groups. The structure and reactivity of the molecule are impacted by this region, which is referred to as a lone pair. The wider balloon makes it easier to see where these unshared electron pairs are located and how they affect the molecule's overall structure and behaviour.

learn more about lone pairs here:

https://brainly.com/question/30886923

#SPJ4

Sort each of the following metamorphic rocks according to its proto Items (5 images) (Drag and drop into the appropriate area below) NO MUS Metaconglomerate Schist Phyllite Categories Mudstone Sandstone Conglomerate 1 OF 10 QUESTIONS COMPLETED < 04/10 > SUBMIT ANSWER MacBook Air Sort each of the following metamorphic rocks according to its protolith. Items (5 images) (Drag and drop into the appropriate area below) hist Phyllite Marble Quartzite ?

Answers

The protoliths for the displayed photos are: Quartzite - Sandstone, Schist and Phyllite - Mudstone or Shale, Marble - Limestone or Dolomite, and Metaconglomerate - Conglomerate.

Protoliths, or pre-existing rocks, undergo metamorphosis under extreme pressure, temperature, and/or chemical changes to become metamorphic rocks. The shown pictures show several kinds of metamorphic rocks with unique protoliths, textures, and mineral compositions. Sandstone may create quartzite, a hard, granular rock with a high quartz concentration. Both schist and phyllite, which are composed of mudstone or shale, have distinctive foliated textures, with schist having a coarser texture than phyllite. Marble is a crystal-like rock that is made from limestone or dolomite and has a wide range of hues and patterns. In addition, metaconglomerate, which is a layer of conglomerate with visible pebbles and cobbles, is a coarse-grained, layered rock.

learn more about metamorphosis here:

https://brainly.com/question/28206207

#SPJ4

choose the pair of words or phrases that best completes the sentence below. isoelectronic species have radii that vary with even though they have the same number of . select the correct answer below: the number of electrons; protons atomic number; electrons atomic number; neutrons the number of electrons; neutrons

Answers

The pair of words or phrases that best completes the sentence "Isoelectronic species have radii that vary with ___even though they have the same number of ___." is "atomic number; electrons."

Explanation:

Isoelectronic species refers to atoms, molecules or ions having the same number of electrons but a different number of protons. They have identical electron configurations but different nuclear charges. As a result, they may have different ionic radii.

The ionization energy and electron affinity of isoelectronic species are identical, but the size of the atoms varies with the nuclear charge or atomic number. Atomic radius depends on the number of electrons and the nuclear charge. This is because the nuclear charge exerts an attractive force on the electrons in the outer shell that holds them in place.

The greater the nuclear charge, the smaller the atom.The pair of words or phrases that best completes the sentence is "atomic number; electrons." The number of electrons in the outermost shell of an atom determines its size. As we progress from left to right on a period, the number of electrons in the outer shell stays the same, but the nuclear charge increases.

This results in a decrease in size from left to right .Arranging isoelectronic species in a table shows that the radius of an ion is inversely proportional to the nuclear charge or atomic number.

To know more about Isoelectronic species refer here: https://brainly.com/question/30874804#
#SPJ11

A gas with a constant volume had an original pressure of 1150 torr and a temperature of 75.0 ℃. Pressure was decreased to 760 torr. What is the final temperature of the gas?a. -43.0 ℃b. 49.6 ℃c. 230 ℃d. -251 ℃

Answers

Answer:

A gas with a constant volume had an original pressure of 1150 torr and a temperature of 75.0 ℃. Pressure was decreased to 760 torr. What is the final temperature of the gas?a. -43.0 ℃b. 49.6 ℃c. 230 ℃d. -251 ℃

When preparing to light a gas burner, which of the following do you do first?

Answers

Answer: clear the area of anything flammable such as hair, chemicals, Ect.

Select the correct molecule that is the main product of the Calvin cycle.
1. G3P
2. NADPH
3. Glucose

Answers

The  molecule that is the main product of the Calvin cycle is glucose. The Calvin cycle is also known as the light-independent reactions.

It is a series of biochemical reactions that occur in the stroma of the chloroplast in photosynthetic organisms to produce glucose. The Calvin cycle is made up of three stages: Carbon fixation, Reduction and regeneration of ribulose bisphosphate. Here's a breakdown of each stage:

Carbon fixation: Carbon dioxide enters the Calvin cycle and is converted to organic molecules. During carbon fixation, Rubisco, which is a crucial enzyme in photosynthesis, catalyzes the reaction between carbon dioxide and ribulose bisphosphate, leading to the formation of a six-carbon molecule that splits into two three-carbon molecules. This three-carbon molecule is the starting material for the reduction process.

Reduction: The ATP and NADPH produced during the light-dependent reactions are used to convert the three-carbon molecule produced during carbon fixation into glyceraldehyde-3-phosphate. This process involves a series of biochemical reactions that require the use of energy from ATP and electrons from NADPH.

Regeneration of ribulose bisphosphate: Glyceraldehyde-3-phosphate, which is the main product of the Calvin cycle, is used to regenerate the starting material for carbon fixation, ribulose bisphosphate. During this stage, ATP is used to convert the remaining glyceraldehyde-3-phosphate molecules into ribulose bisphosphate. The Calvin cycle is an essential process in photosynthesis, as it produces glucose, which is the main source of energy for plants and other photosynthetic organisms.

For more such questions on glucose , Visit:

https://brainly.com/question/397060

#SPJ11

write the empirical formula for at least four ionic compounds that could be formed from the following ions: o CIO3^-,
o nh4^ ,
o ch3co2^-,
o pb^4+

Answers

Empirical formulae are the ratios of atoms in a compound that show the lowest possible ratio of atoms per mole of compound.

What is the empirical formula?

In this question, we are to find the empirical formulae for the following ions:

OCl³⁻, NH⁴⁺, CH₃CO₂⁻ and Pb⁴⁺

Empirical formula for OCl³⁻:Oxygen (O) forms an anion by gaining three electrons to form the oxide ion, O²⁻

The ClO₃⁻ ion has one O²⁻ and three Cl⁺ ions. Therefore, the empirical formula is OCl³⁻

Empirical formula for NH₄⁺ :Nitrogen (N) forms a cation by losing three electrons to form N₃⁺ while Hydrogen (H) forms a cation by losing an electron to form H⁺. Therefore, the empirical formula for NH₄⁺ is NH₄⁺

Empirical formula for CH₃CO₂⁻

The ion contains 2 Carbon atoms, 3 Oxygen atoms, and 4 Hydrogen atoms. Divide each number of atoms by the lowest number (2) to give the empirical formula: CH₃CO₂⁻

Empirical formula for Pb⁴⁺:Lead (Pb) forms a cation by losing four electrons to form Pb⁴⁺.Therefore, the empirical formula for Pb⁴⁺+ is Pb⁴⁺.

Learn more about Empirical formula here:

https://brainly.com/question/14044066

#SPJ11

jamal has a sample of a substance and was asked to determine the density of this substance. he measured the mass to be 20g and volume to be 5cm3. what is the density of the sample?

Answers

The density of the sample of a substance with a mass of 20 g and volume of 5 cm³ will be 4 g/cm³.

What is Density of substance?

Density of a substance can be defined as the measure of the amount of mass which is contained in a unit of volume of that substance. The general trend is that most of the gases are less dense than that of liquids, which are in turn less dense than that of solids, but there are numerous exceptions also present in nature.

The density of a substance can be calculated with the help of the formula:

Density = mass/volume.

Given, Mass of substance = 20g

Volume of substance = 5cm³

Density of the sample = mass of substance/volume of substance = 20g/5cm³ = 4 g/cm³

Therefore, the density of the sample is 4 g/cm³.

Learn more about Density here:

https://brainly.com/question/29775886

#SPJ11

Which are the factors that favor SN2 react a) Strong nucleophile, good leaving group, polar protic solver b) Strong nucleophile, good leaving group. c) Weak nucleophile, good leaving group, po d) Strong nucleophile, poor leaving group, po ors that favor SN2 reactions, as described during the lab lecture? aving group, polar protic solvent, methyl or primary halide. e, good leaving group, polar aprotic solvent, methyl or primary halide. o, good leaving group, polar aprotic solvent, methyl or primary halide. phile, poor leaving group, polar aprotic solvent, tertiary halide. uong nucleophile, good leaving group, polar aprotic solvent, tertiary halide. 4. Which alkyl halide reacts fastest with trimethylamine in SN2 reaction? a) CI

Answers

The factors that favor SN2 reactions are Strong nucleophile, good leaving group, polar aprotic solvent, methyl or primary halide.

SN2 reactions require a strong nucleophile, good leaving group, polar aprotic solvent, and a methyl or primary halide. The reason for this is that SN2 reactions occur in a single step, with the nucleophile attacking the substrate and the leaving group departing at the same time. When the nucleophile approaches the substrate, it must be in a good orientation to cause an SN2 reaction.The best orientation for SN2 reactions occurs when the substrate is methyl or primary, the solvent is polar aprotic, the nucleophile is strong, and the leaving group is good. When the leaving group departs, it must be able to do so quickly, so a good leaving group is required. Finally, the solvent must be polar aprotic, which means that it can stabilize negative charges while not inhibiting the reaction by solvating the substrate.

The nucleophile attacks the substrate from the rear in order for this reaction to continue. The angle of the nucleophile's approach to the supplied substrate with respect to the carbon-leaving group bond is 180o. Through a transition state, the carbon-nucleophile bond forms and the carbon-leaving group bond dissolves simultaneously.

The needed product is now created when the leaving group is forced out of the transition state on the other side of the carbon-nucleophile connection. It's crucial to remember that the product is created by inverting the tetrahedral geometry at the central atom.

For more such questions on SN2 reactions , Visit:

https://brainly.com/question/25175580

#SPJ11

20pcm3 og a gas has a pressure of 510mmhg what will be the volume of the pressure is increased to 780mmhg, assuming there is no change in temperature​

Answers

The volume of the gas will decrease from 20 cm³ to 13.08 cm³.

What is Boyle's law?

Boyle's law is a gas law that states that the product of the pressure and volume of a gas is constant at constant temperature.

What is the significance of assuming no change in temperature in this problem?

Assuming no change in temperature is significant because it allows us to apply Boyle's law to solve the problem. If the temperature were to change, we would need to use a different gas law, such as Charles's law or the combined gas law, to account for the change in temperature.

We can use Boyle's law to solve this problem, which states that the product of the pressure and volume of a gas is constant at constant temperature. Mathematically, we can express this as P₁V₁ = P₂V₂, where P₁ and V₁ are the initial pressure and volume, respectively, and P₂ and V₂ are the final pressure and volume, respectively.

Using this equation, we can solve for V₂:

P₁V₁ = P₂V₂

V₂ = (P₁V₁)/P₂

Substituting the given values, we get:

V₂ = (510 mmHg x 20 cm³) / 780 mmHg

V₂ = 13.08 cm³

Therefore, if the pressure is increased from 510 mmHg to 780 mmHg at constant temperature, the volume of the gas will decrease from 20 cm³ to 13.08 cm³.

Learn more about Boyle's law here:

https://brainly.com/question/30367133

#SPJ1

If you wanted to shift the potential of the lead-zinc cell upward,toward 0.70 V, which of the following actions would give thedesired result? Check all that apply. *Ignore the currentchecks.
Anyaction that makes [Zn2+] smaller than[Pb2+].
Any action that makes [Zn2+]larger than [Pb2+].
Adding some concentratedZn(C2H3O2)2 solution tothe Zn2+/Zn couple.
Anyaction that makes Q > 1.0.
Addingsome concentratedPb(C2H3O2)2 solution tothe Pb2+/Pb couple.
Anyaction that makes log Q positive.
Any action that makes log Qnegative.
Any action that makes Q <1.0.

Answers

To shift the potential of the lead-zinc cell upward, toward 0.70 V, the following actions would give the desired result:

Add some concentrated Pb(C2H3O2)2 solution to the Pb2+/Pb couple

Adding some concentrated Zn(C2H3O2)2 solution to the Zn2+/Zn couple

Any action that makes [Zn2+] larger than [Pb2+]

A lead-zinc cell is a galvanic cell consisting of lead and zinc electrodes immersed in a suitable electrolyte. The potential of the lead-zinc cell is the difference in electrode potential between the lead and zinc electrodes, as determined by their concentration gradient.

Therefore, to shift the potential of the lead-zinc cell upward, toward 0.70 V, one should add some concentrated Pb(C2H3O2)2 solution to the Pb2+/Pb couple, add some concentrated Zn(C2H3O2)2 solution to the Zn2+/Zn couple, and any action that makes [Zn2+] larger than [Pb2+].

To learn more about "lead-zinc cell", visit: https://brainly.com/question/31316460

#SPJ11

understand what are the effects when there is low [s], high [s], and when vo is one half of the vmax. biochem]

Answers

The effect of low [s] is that the rate of the reaction will decrease and the effect of high [s] is that the rate of the reaction will increase. When Vo is one-half of Vmax, the effect is that the reaction has reached its half-maximum velocity, or that the reaction has reached its maximum efficiency.

The rate of the reaction will decrease in the case of low [s] as the substrate concentration is too low to support the reaction. On the other hand, the rate of reaction will increase in the case of high [s] as there is a greater amount of substrate to drive the reaction.

To understand these effects in a better way, we can use the Michaelis-Menten equation to calculate the rate of reaction at various substrate concentrations (Vo and Vmax) and also the reaction's maximum velocity (Vmax):-

V = Vmax[S]/(Km + [S])

Where Vmax is the maximum velocity of the reaction, Km is the Michaelis constant, and [S] is the concentration of the substrate.

Learn more about Vmax:

https://brainly.com/question/14529099

#SPJ11

The descriptions below explain two ways that water is used by plants on a sunny day.

I. In a process called transpiration, some liquid water in leaves changes to water vapor. The water vapor is released into the air through tiny pores in the leaves. This allows more liquid water from the soil to be pulled up the roots and stem to replace water lost from the leaves.

II. Plants use some of this water in leaves in a process called photosynthesis. During photosynthesis, water and carbon dioxide break apart and recombine to form two new substances, oxygen and glucose.

Based on the above description of transpiration and photosynthesis, which type of change happens to water during each process?

In transpiration, because some of its properties change, water undergoes a physical change but keeps its identity. In photosynthesis, because its identity changes, water undergoes a chemical change.
In transpiration, because some of its properties change, water undergoes a chemical change but keeps its identity. In photosynthesis, because its identity changes, water undergoes a physical change.
In transpiration, because its physical properties change, water undergoes a physical change and loses its identity. In photosynthesis, because it keeps its identity, water undergoes a chemical change.
In transpiration, because its chemical properties change, water undergoes a chemical change and loses its identity. In photosynthesis, because it keeps its identity, water undergoes a physical change.

Answers

The correct answer is: In transpiration, because some of its properties change, water undergoes a physical change but keeps its identity.

What are transpiration and photosynthesis?

Transpiration and photosynthesis are both processes that involve the use of water by plants.

Transpiration is the process by which water evaporates from the leaves of a plant and is released into the atmosphere. This occurs through tiny openings on the surface of leaves called stomata. The water that is lost through transpiration is replaced by water absorbed by the roots of the plant from the soil.

Photosynthesis, on the other hand, is the process by which plants use water, along with carbon dioxide and sunlight, to produce oxygen and glucose. During photosynthesis, water is split into hydrogen and oxygen, and the oxygen is released into the atmosphere as a byproduct. The glucose that is produced is used as a source of energy by the plant.

In transpiration, because some of its properties change, water undergoes a physical change but keeps its identity. In photosynthesis, because its identity changes, water undergoes a chemical change.

To know more about photosynthesis, visit:

https://brainly.com/question/29764662

#SPJ1

Answer:

Its A

Explanation:

Got it right on the quiz

3. Assertion (A): There is a small gap left between the rails of a railway track
Reason (R): Cooling of substances result in contraction.
Both A and R are true but R is not the correct explanation of A
A is false but R is true
b.
c. A is true but R is false
d. Both A and R are true and R is the correct explanation of A

Answers

There is a small gap left between the rails of a railway track Reason (R): Cooling of substances result in contraction. Both A and R are true but R is not the correct explanation of A,

Why cooling causes contraction ?

When a substance is cooled, it means that the heat is removed from the substance. This results in fewer excited molecules and, as a result, less random motion. The force of attraction increases, resulting in fewer spaces between molecules, which causes contraction.

Why there is appearance of gap between railway track?

The gaps left between successive rails on a railway track as a result of the rails expanding in the summer. The gap exists to allow for this expansion. If no gap is left, the summer expansion will cause the rails to bend sideways. This will lead to train accidents.

to know more about contraction , visit ;

brainly.com/question/2669219

#SPJ1

salts are composed of both cations and anions, both of which can potentially affect ph. which of the following salts would you test if you wanted to observe how just anions affect ph? group of answer choices nach3coo cacl2 nahco3 tris-hcl na2co3 nh4cl

Answers

The salt which you would test if you wanted to observe how just anions affect pH is Na2CO3.

What is salt? Salts are inorganic compounds made up of a cation and an anion. Salts are formed by the neutralization of an acid with a base, for example, hydrochloric acid and sodium hydroxide form table salt: NaCl. The cation is typically a metal or a positively charged organic compound, whereas the anion is generally a non-metal or a negatively charged organic compound. The salt's properties are a function of the cation and anion and are hence unique.

Salt's effect on pH: Salts are made up of cations and anions, both of which can have an impact on pH. Cations and anions can both have an impact on the pH of the solution, but they can do it in different ways. The pH of a solution can be affected by the anion of the salt since it can act as a base or an acid. The pH of a solution can be affected by the cation of the salt since it can act as an acid or a base. For instance, if we dissolve copper sulfate in water, the pH of the solution will be acidic since the sulfate ion will be hydrolyzed to create sulfuric acid, H2SO4.

However, if we dissolve sodium carbonate in water, the pH of the solution will be basic because the carbonate ion acts as a base, picking up H+ ions from water molecules to generate HCO3- ions. Hence, Na2CO3 is the salt which you would test if you wanted to observe how just anions affect pH.

To learn more about "cations and anions", visit: https://brainly.com/question/28971609

#SPJ11

Balance and state the type for these equations: _Ca(OH)2 + _HCl —> _CaCl2+ _H2O

Answers

Answer:

1,2,1,2

Explanation:

When the energy released by forming solvent-solute attractions is greater than the energy absorbed by overcoming solute-solute and solvent-solvent attractions, the dissolving process a. has a negative heat of solution. b. has a positive heat of solution. c. occurs rapidly d. does not occur.

Answers

When the energy released by forming solvent-solute attractions is greater than the energy absorbed by overcoming solute-solute and solvent-solvent attractions, the dissolving process has a negative heat of solution. correct answer is option A

A negative heat of solution is created when the amount of energy required to dissolve a solute in a solvent is less than the amount of energy released when the solute and solvent combine. This generally occurs when the solute-solvent interactions are stronger than the solute-solute and solvent-solvent interactions.  

The magnitude of the heat of solution is determined by the magnitude of the change in enthalpy. The enthalpy change of the solvent-solute interaction is the heat change that occurs when one mole of solute is dissolved in a given solvent. A negative enthalpy change indicates an exothermic reaction, whereas a positive enthalpy change indicates an endothermic reaction.

Know more about endothermic reaction here:

https://brainly.com/question/23184814

#SPJ11

The coupling reaction of two radicals is ______________ and involves ______ arrow(s).
endothermic, one
exothermic, one
endothermic, two
exothermic, two

Answers

The coupling reaction of two radicals is b. exothermic and involves one arrow.

A radical is a chemical entity that contains an unpaired electron in its valence shell, which makes it highly reactive. Molecules that contain an unpaired electron are referred to as "free radicals." Coupling reactions between free radicals involve the interaction of two free radicals, both of which have an unpaired electron. A covalent bond is created when these two free radicals join together, effectively eliminating the unpaired electron. This coupling reaction can be exothermic or endothermic based on the number of arrows present.

For two radicals, only one arrow is needed for the exothermic coupling reaction. The reaction is exothermic, and heat is produced as a result of the reaction. The energy produced by the bond-forming reaction overcomes the energy of the starting materials. This energy that is generated raises the kinetic energy of the product's components. As a result, the temperature of the system increases. For two radicals, the endothermic coupling reaction requires two arrows. The reaction absorbs energy, causing the temperature of the system to decrease.

Learn more about covalent bond at:

https://brainly.com/question/11674395

#SPJ11

Testing for Alcohols & Carboxylic Acids
1. The presence of a primary or secondary alcohol can be confirmed by reaction with acidified potassium
dichromate solution which changes colour from orange to green.
a) State the name formula of the reagent used to test for the presence of a primary/secondary alcohol.
b) State the colour change observed when this reagent reacts with an alcohol.
c) What type of compound is produced by the oxidation of a primary alcohol?
d) What type of compound is produced by the oxidation of a secondary alcohol?
e) Explain why the dichromate test does not work for tertiary alcohols such as methylpropan-2-ol.
Include the chemical structure of methylpropan-2-ol in your explanation.
2.a) Describe a simple chemical test for the presence of a carboxylic acid group in a molecule.
Reagent:
Observation:
b) Describe how you would confirm that the gas produced in this test is carbon dioxide.
c) Explain why, for a completely unknown compound, the hydrogencarbonate test is not conclusive proof
that a carboxylic acid group is present.

Answers

Answer:

a) Acidified potassium dichromate solution is used to test for the presence of a primary or secondary alcohol.

b) The orange color of the potassium dichromate solution is reduced to green when it reacts with an alcohol.

c) The oxidation of a primary alcohol produces a carboxylic acid.

d) The oxidation of a secondary alcohol produces a ketone.

e) The dichromate test does not work for tertiary alcohols because they cannot be further oxidized. Methylpropan-2-ol is a tertiary alcohol with the chemical structure:

CH3

|

CH3—C—OH

|

CH3

Since there are no hydrogen atoms attached to the carbon atom bearing the hydroxyl group, it cannot be oxidized.

a) A simple test for the presence of a carboxylic acid group is the addition of sodium hydrogencarbonate solution to the compound. The reagent reacts with the carboxylic acid to produce carbon dioxide gas.

Reagent: Sodium hydrogencarbonate solution

Observation: Effervescence (bubbling) due to the release of carbon dioxide gas.

b) To confirm that the gas produced in the hydrogencarbonate test is carbon dioxide, it can be tested with limewater. Carbon dioxide turns limewater milky/cloudy due to the formation of calcium carbonate.

c) The hydrogencarbonate test is not conclusive proof that a carboxylic acid group is present in a completely unknown compound because some other functional groups such as phenols and alcohols can also react with the reagent and produce carbon dioxide. Therefore, additional tests such as the dichromate test or Tollens' test may be needed to confirm the presence of a carboxylic acid group.

(please could you kindly mark my answer as brainliest and a follow would be really nice)

Iron nail wrapped with copper wire Determine the standard reduction potential of the cathode half-reaction, the standard reduction potential of the anode half-reaction, and the standard potential of the cell. E°cathode ____
(V) E° anode ___ (V) E° cell ___ (V)

Answers

The standard reduction potential of the cathode half-reaction is -0.36V,

The standard reduction potential of the anode half-reaction is +0.34V,

and the standard potential of the cell is -0.02V.

The cathode half-reaction is the reduction of iron (Fe²⁺) to iron (Fe):

Fe²⁺ + 2e⁻ -> Fe; E°cathode = -0.36V.

The anode half-reaction is the oxidation of copper (Cu) to copper (Cu²⁺):

Cu -> Cu²⁺ + 2e⁻; E°anode = +0.34V.
The standard potential of the cell is determined by subtracting the standard reduction potential of the anode from the standard reduction potential of the cathode:

E°cell = E°cathode - E°anode

= -0.36V - (+0.34V)

= -0.02V.

Learn more about the standard potential of the cell here:

https://brainly.com/question/19036092

#SPJ11

What is the minimum and maximum number of studies and literatures in literature review?

Answers

Generally, a literature review should aim to provide a comprehensive and up-to-date overview of the existing research and scholarly literature relevant to the research question or topic. This means that the number of studies or literatures included in a literature review will depend on factors such as the breadth and depth of the research question, the availability and relevance of existing research, and the scope of the research project.

It is important to ensure that the literature review is well-organized, critically analyzed, and clearly presented, regardless of the number of studies or literatures included. The focus should be on selecting high-quality and relevant sources, rather than simply aiming for a specific number of sources. A literature review should provide a thorough synthesis and analysis of the existing literature, and should demonstrate a clear understanding of the key debates, trends, and findings in the field.

Density and molar mass of gases 0.96 g of a gas occupies a volume of 0.672L at STP (0°C and 1atm). What is the identity of the gas: O N2 or CO2?

Answers

The calculated molar mass of 32 g/mol is the same as the molar mass of oxygen. Thus, the gas is O2.

What is the identity of gas?

Let us determine the molar mass of this gas. We can begin with the density of the gas as follows:

Density = mass/volume
Density = 0.96 g/0.672 L

Density = 1.43 g/L

We know that at STP (standard temperature and pressure), temperature is 0°C and pressure is 1 atm. We can use these values to determine the molar volume of a gas, which is 22.4 L.

Molar volume = 22.4 L at STP
Thus,
1 mole of gas occupies 22.4 L at STP

We can determine the number of moles of the gas as follows:

Number of moles = volume/molar volume
Number of moles = 0.672 L/22.4 L/mol
Number of moles = 0.03 mol

The molar mass can be determined using the following formula:
molar mass = mass/number of moles
molar mass = 0.96 g/0.03 mol
molar mass = 32 g/mol

The calculated molar mass of the gas is 32 g/mol. Now let us compare this molar mass with the molar mass of the given gases.
Oxygen (O2) has a molar mass of 32 g/mol

The calculated molar mass of 32 g/mol is the same as the molar mass of oxygen. Therefore, the identity of the gas is O2.


Learn more about Gases here:

https://brainly.com/question/1467765

#SPJ11

1. calculate the final concentration of sodium azide and dcmu in the locomotion chambers. show your work. The DCMU is a 10mM concentrationThe Sodium Azide is a 1M concentration.If you add 10mL of the Chlamydomonas, 100 microliters of sterile water, and 100 microliters of 10mM DCMU what is the final concentration of DCMU?If you add 10mL of the Chlamydomonas, 100 microliters of sterile water, and 100 microliters of 1M Sodium Azide what is the final concentration of DCMU?

Answers

The final concentration of DCMU in the locomotion chambers will be 0.1 mM. If 10mL of the Chlamydomonas, 100 microliters of sterile water, and 100 microliters of 10mM DCMU is added.

To Calculate the final concentration of Sodium Azide and DCMU in the locomotion chambers. The final concentration of Sodium Azide in the locomotion chambers will be 10mM (millimolar) if 10mL (milliliters) of the Chlamydomonas, 100 μL (microliters) of sterile water, and 100 μL of 1M (molar) Sodium Azide is added.

The final concentration of DCMU (3-(3,4-dichlorophenyl)-1,1-dimethylurea) in the locomotion chambers will be 0.1 mM (millimolar) if 10 mL (milliliters) of the Chlamydomonas, 100 μL (microliters) of sterile water, and 100 μL of 10 mM (millimolar) DCMU are added.

Calculating the final concentration of DCMU:

Formula: C1V1 = C2V2C1 = initial concentration of DCMU = 10 mMV1 = volume of DCMU added = 100 μL (microliters)C2 = final concentration of DCMU = ?V2 = final volume = 10 mL + 100 μL + 100 μL = 10.2 mL

(convert 100 μL to mL by dividing it by 1000)

Substituting the values in the formula:

C1V1 = C2V210 mM x 100 μL = C2 x 10.2 mL1000 (since 1 mL = 1000 μL)C2 = 0.098 mM (millimolar) = 0.1 mM (approx.)

Thus, the final concentration of DCMU in the locomotion chambers will be 0.1 mM if 10mL of the Chlamydomonas, 100 microliters of sterile water, and 100 microliters of 10mM DCMU is added.

For more such questions on concentration , Visit:

https://brainly.com/question/28564792

#SPJ11

Other Questions
of all the ways that people might have made it to chile near the tip of south america by 14,600 year ago, which two have been part of the most recent debate by anthropologists and archeologists? (select two) Jupiter's four large moons - Io, Europa, Ganymede, and Callisto - were discovered by Galileo in 1610. Jupiter also has dozens of smaller moons. Callisto has a radius of about 2.40 x 106 m, and the mean orbital radius between Callisto and Jupiter is 1.88 x 109 m.(a) If Callisto's orbit were circular, how many days would it take Callisto to complete one full revolution around Jupiter?(b) If Callisto's orbit were circular, what would its orbital speed be? Find the current in each resistor in the figure(Figure 1) . Suppose the four resistors in this circuit have the values R1 = 3.8 , R2 = 5.5 , R3 = 2.1 , and R4 = 8.3 , and that the emf of the batteries are E1 = 9.0V and E2 = 9.0V . two different proteins have different amino acid sequences. these proteins will have: please choose the correct answer from the following choices, and then select the submit answer button. answer choices;a. the same shape with different functions. b.different shapes with the same function. c.the same function different shapes.d.and different functions. the same shape. Bonjour j'ai besoin d'aide pour rpondre aux questions (tout en bas de la page) a partir du texte ci-dessous. Ce texte viens de "La cure" D'Emile Zoladsol pour les grosses fautes j'ai utilis apple pour copier coller le texteMerci d'avanceLe bal costum bat son plein chez les Saccard. Rente vient d'apprendre que Maxime va se marier. Consterne, elle l'entraine dans sa chambre. Mais Sidonie le remarque et prvient Aristide, qui surprend les deux amants enlacs. Furieux, il se calme soudain en voyant que sa femme a signt l'acte de vente de sa dernire propritt. Il sen empare et quitte la pice avec son fils. Rente se retrouve seule, humilite et dsesprte.Elle s'aperut dans la haute glace de l'ar-moire. Elle s'approcha, tonne de se voir, oubliant son mari, oubliant Maxime, toute proccupe par l'trange femme qu'elle avait devant elle. La folie montait. Ses cheveux jaunes, relevs sur les tempes et sur la nuque, lui parurent une nudit, une obscnit. [...]Qui l'avait mise nue ? Que faisait-elle dans ce dbraill de fille qui se dcouvre jusqu'au ventre? Elle ne savait plus. Elle regardait ses cuisses que le maillot arrondissait, ses hanches dont elle suivait les lignes souples sous la gaze, son buste largement ouvert; et elle avait honte d'elle, et un mpris de sa chair l'emplissait d'une* sourde colre contre ceux qui la laissaient ainsi, avec de simples cercles d'or aux chevilles et aux poignets pour lui cacher la peau. [...]tiroir, 1936, huile sur toile, 110,3 x 138,2 cm, coll. prive.Et, dans l'ombre bleutre de la glace, elle crut voir se lever les figures de Saccard et de Maxime.Saccard, noirtre, ricanant, avait une couleur de fer, un rire de tenaille, sur ses jambes grles*. Cet homme tait une volont. Depuis dix ans, elle le voyait dans la forge, dans les clats du mtal rougi, la chair brle, haletant, tapant toujours, soulevant des marteaux vingt fois trop lourds pour ses bras, au risque de s'crasernts du entlui-mme. Elle le comprenait maintenant; il lui apparaissait grandi par cet effort : surhumain, par cette coquinerie norme, cette ide fixe d'une immense fortuneervez , leIssiimmdiate. Elle se le rappelait sautant les obstacles, roulant en pleine boue, et ne prenant pas le temps de s'essuyer pour arriver avant l'heure, ne s'arrtant mme pas jouir en chemin, mchant ses pices d'or en courant. Puis la tte blonde et jolie de Maxime apparaissait derrire l'paule rude de son pre : il avait son clair*. sourire de fille, ses yeux vides de catin qui ne se baissaient jamais, sa raie au milieu du front, montrant la blancheur du crne. Il se moquait de Saccard, il le trouvait bourgeois de se donner tant de peine pour gagner un argent qu'il mangeait, lui, avec une si adorable paresse. Il tait entretenu. Ses mains longues et molles contaient ses vices. Son corps pil avait une pose lasse de femme assouvie. Dans tout cet tre lche et mou, o tout le vice coulait avec la douceur d'une eau tide,en1 dansne luisait pas seulement l'clair de la curiosit du mal. Il subissait. Et Rene, en regardant les deux apparitions sortir des ombres lgres de la glace, recula d'un pas, vit que Saccard l'avait jete comme un enjeu, comme une mise de fonds, et que Maxime s'tait trouv l, pour ramasser ce louis tomb de la poche du ..spculateur. Elle restait une valeur dans le portefeuille de son mari; il la poussait aux toilettes d'une nuit', aux amants d'une saison; il la tordait dans les flammes de sa forge, se servant d'elle, ainsi que d'un mtal prcieux, pour dorer le fer de ses mains. Peu peu, le pre l'avait ainsi rendue assez folle, assez misrable, pour les baisers du fils. Si Maxime tait le sang appauvri de Saccard, elle se sentait, elle, le produit, le fruit vreux de ces deux hommes, l'infamie qu'ils avaient creuse entre eux, et dans laquelle ils roulaient l'un et l'autre.Elle savait maintenant. C'taient ces gens qui l'avaient mise nue. Saccard avait dgraf le corsage, et Maxime avait fait tomber la jupe. Puis, eux deux, ils venaient d'arracher la chemise. prsent, elle se trouvait sans un lambeau, : avec des cercles d'or, comme une esclave. Ils la regardaient tout l'heure, ils ne lui disaient pas : Tu es nue. Le fils tremblait comme un lche, frissonnait la pense d'aller jusqu'au bout de son crime, refusait de la suivre dans sa passion.Le pre, au lieu de la tuer, l'avait vole; cet homme punissait les gens en vidant leurs poches [...]. C'taient des lches. Ils l'avaient mise nue.Questions :2) Pourquoi Rene est-elle tonne de voir une trange femme ?3) Quelle image a-t-elle d'elle-mme dans cet extrait ?Procdez une comparaison avec l'incipit.4) Quels sentiments Rene prouve-t-elle envers lesdeux hommes ? Expliquez.5) Montrez que pre et fils sont prsents la foiscomme semblables et opposs.6) a. Quelle mtaphore file est utilise pour voquerSaccard ? quel extrait cela vous fait-il penser ?b. De quel dieu antique Saccard est-il rapproch ? Which conic section is formed when a plane intersects the central axis of a double-napped cone at a 90 angle? Some people think that only by taking up very high jobs, you are doing something important or you are doing national service. But we all know that the most complex machinery will be ineffective if one small screw is not working as it should and that screw is just as important as any big part. It is the same in national life. There is no job that is too small; there is no person who is too small. Everybody has something to do. And if he or she does it well, then the country will run well. What is one of Gandhis claims in the excerpt?Most people do not choose the right job. Most people are happier doing basic jobs. The smallest jobs are the most important jobs. The smallest jobs are essential to the country . explain the effect that the change in blood vessel length had on flow rate. how well did the results compare with your prediction? In this assignment, you will choose an issue you have read about in this course. You will create a multimedia blog that addresses the issue and makes a strong argument. Your blog will include a blog title, a post title, an argument, and multimedia components that support the argument and get readers to participate Which inference can be made based on the information in the excerpt? Consider the following silica gel TLC plate of compounds A, B, and C developed in hexanes:Consider the following silica gel TLC plate of coma) Determine the R f values of compounds A, B, and C run on a silica gel TLC plate using hexanes as the solventb) Which compound, A, B, or C, is the most polar?c) What would you expect to happen to the R f values if you used acetone instead of hexanes as the eluting solvent? (Think polarity of solvents) Last season, a hockey player had 28 goals. This season, the player had 12 goals. By what percent has the number of goals decreased? Round to the nearest percent -57% -28% -42% -133% O given the discussion in example 9.4.4, what is the maximum possible length of the repeating section of the decimal representation of 727 1,229 ? what do the words kumbengo, birimintingo, and sataro mean relative to mande musical practice? where did you hear examples of these in the chapter's musical selections? Types of unemployment Tthe three people described in the following table are categorized as unemployed by the Bureau of Labor Statistics. Identify each person in the table as structurally, frictionally, or cyclically unemployedStructural Frictional Cyclical Unemployment Type Amy just graduated from college and is looking for a full-time position with an investment banking firm. Structural/ Frictional/ CyclicalDeborah is a real estate agent. House sales in her area have declined because the region has been going through a recession. She has no clients and is currently looking for a new full-time job. Structural/ Frictional/ CyclicalVan left his job as a plumber when his wife took a position in another region. The quantity of plumbing services demanded is considerably lower in the new region, in part because of high union-negotiated wages. He would like to work at the high union wage but remains unemployed due to a lack of plumbing jobs. Structural/ Frictional/ CyclicalThe following table shows data on frictional, cyclical, structural, and total unemployment for an economy. Unemployment Type Rate (Percent)Frictional 3.9 Cyclical 0.0 Structural 1.1Total unemployment 5.0True or False this economy is not currently at uts natural rate unploymentoTrue oFalse Freedom of speech is arguably the primary guarantor of the American approach to life because it a. cannot be infringed without a warrant based on probable cause b. is absolute c. equates corporate personhood with human personhood d. is indispensable to democracy 12 Complete the sentences with the present simple or present continuous form of these verbs. check, not/do, not/eat, go, learn, play, read, spend1 We ____________ a new language at the moment. 2 My friends and I often ____________ time at each others houses. 3 Can you wait a moment? I ____________ my emails. 4 How often ____________ you ____________ to the gym?5 I ____________ a really interesting book at the moment. 6 Currently, a friend of mine ____________ any sweets and he says he feels healthier. 7 Im nearly eighty, but I ____________ any exercise!8 More old people ____________ computer games these days. It isnt just the young people. 13. Write pairs of questions. Use the present simple in one question, and the present continuous in the other. 1 a How / usually spend your free time? b / you / do / much sport these days?2 a / often / read novels? b / read / any good books at the moment?3 a Where / normally go on holiday? b Where / plan to go this year?4 a / speak / any other languages? b / learn / any new languages? why is it important to keep the filtrate and reagents cold? The physical setting in which a speech occurs can have a significant impact on the outcome of a speech.True or False What type of device used microwaves for communication