Thiamine hydrochloride (vitamin B1 hydrochloride, HC12- H17ON4SCl2) is a weak acid with Ka 5 3. 4 3 1027. Sup- pose 3. 0 3 1025 g of thiamine hydrochloride is dissolved in 1. 00 L of water. Calculate the pH of the resulting solution. (Hint: This is a sufficiently dilute solution that the autoion- ization of water cannot be neglected. )

Answers

Answer 1

According to the given statement The pH of the resulting solution is 13.03.

How to calculate pH?

To calculate the pH of the resulting solution, we need to know the concentration of the thiamine hydrochloride ions in the solution.

The Ka value of thiamine hydrochloride is 5.3 x 10^-27. Since thiamine hydrochloride is a weak acid, it dissociates in water according to the following equation:

HC12-H17ON4SCl2 (s) <-> H+ (aq) + C12-H17ON4SCl2- (aq)

The product of the acid and the base concentrations is equal to the acid dissociation constant (Ka)

H+(aq) * C12-H17ON4SCl2- (aq) = Ka

Molarity (M) = moles of solute/liters of solution

3.0 x 10^-25 g of thiamine hydrochloride is dissolved in 1.00 L of water. The molar mass of thiamine hydrochloride is 337.29 g/mol. So we can calculate the number of moles of thiamine hydrochloride in the solution.

moles = mass / molar mass

moles = 3.0 x 10^-25 / 337.29 = 8.94 x 10^-28

Molarity = moles / liters = 8.94 x 10^-28 / 1 = 8.94 x 10^-28 M

Now we can substitute the concentration of thiamine hydrochloride into the equation for the acid dissociation constant.

Ka = [H+] * [C12-H17ON4SCl2-]

Ka = (x)(x) = 8.94 x 10^-28

We know the Ka value and we know the concentration of thiamine hydrochloride ions. So we can use the Ka value and the thiamine hydrochloride concentration to calculate the concentration of H+ ions in the solution.

x^2 = 8.94 x 10^-28

x = √(8.94 x 10^-28)

x = 9.4 x 10^-14

[H+] = x = 9.4 x 10^-14 M

The pH of the solution is calculated by taking the negative log of the H+ concentration:

pH = -log(9.4 x 10^-14)

pH = 13.03

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Related Questions

Read the following chemical equation.

Cl2 (g) + K+ Br− → K+ Cl− + Br2 (g)

What most likely happens during this reaction? (5 points)
Potassium loses an electron.
Potassium gains an electron.
Bromine loses an electron.
Bromine gains an electron.

Answers

In the chemical equation,Cl₂ (g) + K+ Br− → K+ Cl− + Br₂ (g) bromine looses an electron in the reaction.

What is chemical equation?

Chemical equation is a symbolic representation of a chemical reaction which is written in the form of symbols and chemical formulas.The reactants are present on the left hand side while the products are present on the right hand side.

The first chemical equation was put forth by Jean Beguin in 1615.By making use of chemical equations the direction of reaction ,state of reactants and products can be stated. In the chemical equations even the temperature to be maintained and catalyst can be mentioned.

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The "Great Ocean Conveyor Belt" is an ocean current that helps move heat energy around the earth and keeps our atmosphere more liveable. This ocean current is caused by differences in water density. These differences are caused mainly by
A.) Chemical content and surface winds

B.) Salinity and surface winds

C.) Water temperatures and salinity

D.) Water temperatures and geographical formations
I NEED ANSWER ASAP

Answers

The ocean current is caused by differences in water density. The difference in the density of water is mainly caused by the temperature and salinity of water.

What is density?

Density of a substance is the measure of its mass per unit volume. It describes how closely its particles are packed within a given volume. Density of a substance is dependent on the temperature and pressure also.

The density of water is affected by the temperature and salinity. Water has its maximum density at 4 ° C. The more saline is water, more will be the density. Because, more ions or salts makes water denser.

The density vary with variations in temperature and salinity. This variation causes water currents from the denser areas to the less dense areas. Ocean currents are also affected by the gravity.

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2 H2 + O2 --> 2 H2O

What mass of water (H2O) will be collected if 20. 0 grams of hydrogen gas (H2) are consumed?

Select one:


179 grams


89. 4 grams


44. 7 grams


358 grams

Answers

Answer:

2H2 +O2 - 2H20

4g of H react to give 36g of H20

20g of H gives Xg of H20

cross multiply

4x= 36*20

4x= 720

Xg = 720/4

Xg= 180g approximately

That is A which is 179



If the amount of H2 is doubled, how many moles of H2O would have formed?

Express your answer as an integer.

Answers

If the amount of H2 is doubled, then two moles of water have been created.

Hydrogen and water molecular interactions

Since one mole of H2 is required for the synthesis of one mole of water, doubling the amount of H2 would result in the formation of two moles of H2O. Hydrogen concentration and water content are connected. Five moles of water can be created if there are five moles of hydrogen available.

Similar to this, if 10 moles of hydrogen are accessible, ten moles of water can be produced, leading us to believe that if the amount of H2 is doubled, two times as many moles of water have been formed.

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A baketball ha a momentum of 6. 0 kg m/ outh and a ma of 0. 15 kg what i the baketball velocity

Answers

The basketball velocity is 40 m/s.

What is velocity?

A vector quantity with both size and direction is velocity. In respect to time, it is the rate with which a displacement changes. Using the formula velocity = displacement/time, velocity may be computed. It is a way to gauge how quickly something is moving in a certain direction. Acceleration, or the rate at which an object's velocity changes, is closely related with velocity. Being a vector quantity, velocity has both a direction and a magnitude. An object must move at the a constant speed and in the same direction in order to maintain a constant velocity.

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Which of these is not a property of the intracellular fluid (ICF)?The concentration of chloride ion is lower than that of interstitial fluid. The concentration of potassium ion exceeds that of sodium ion. The concentration of sodium ion exceeds that of potassium ion. The protein concentration is higher than that of interstitial fluid.

Answers

The protein concentration is higher than that of interstitial fluid. The intracellular fluid (ICF) is the fluid inside cells, and is composed of water, electrolytes, and organic molecules.

The intracellular fluid (ICF) is the fluid inside cells, and is composed of water, electrolytes, and organic molecules. Common properties of ICF include high concentrations of potassium ions and low concentrations of chloride ions compared to interstitial fluid. The protein concentration of ICF is lower than that of interstitial fluid.

The protein concentration is higher than that of interstitial fluid.

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What group could X be in if it forms ions with ammonium in the ratio of (NH4)3X?
X could be in Group

Answers

If it forms ions with ammonium in the ratio of (NH4)3X, X could be in Group IV A. Group IVA (14) metals form cations with +4 charge, although tin (Sn) and lead (Pb) can form cations having +2 charge.

What does the term "coordinate bond" mean?

A covalent link (a shared pair of electrons) in which both electrons originate from the same atom is known as a coordinate bond (also known as a dative covalent bond). Two atoms sharing a pair of electrons make a covalent connection. Because the electron pair is drawn to both nuclei, the atoms are kept together.

How is a coordinate bond recognized?

An arrow pointing from the donor to the acceptor, with a positive charge on the donor and a negative charge on the acceptor, is used to symbolize a coordinate bond.

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I need some chemistry help
Thank u

Answers

H2(g) + Cl2(g) = 2 HCl (g) AH-184.6 kJ where the mathematical notation for "is equivalent to" is. However, we also have a quantity called energy change in our thermochemical equation

What is a thermochemical equation mean?

Thermochemical equations are symmetric chemical equations that take into account both the energy change and the physiological state of all products and reactants. When energy is a reactant, a reaction is endothermic; whereas, when energy is a product, a reaction is exothermic.

How is a thermochemical process expressed in writing?

A balance empirical formula with its heat per reaction is known as a thermochemical equation. They appear to be equal to A+B+C+H=Xjoules. You are already proficient at creating and balancing chemical equations. Therefore, all we must do is add either H or U values.

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given a mixture of lead (2) oxide,ammonium chloride and sodium chloride,describe how this mixture can be separated to obtain a sample of each

Answers

Answer:

It can be done by crystallization, filtration, and sublimation. The easiest method among the three is separation by sublimation. Ammonium chloride sublimes upon heating. Actually, the sublimation is a decomposition of ammonium chloride forming ammonia and hydrogen chloride

Explanation:

What are the possible stress or disturbances for chemical reactions

Answers

There are several factors that can cause stress or disturbances in chemical reactions. These can include changes in temperature, pressure, concentration, and the presence of impurities or catalysts. Other factors that can affect the rate or outcome of a chemical reaction include the surface area of the reactants, the presence of light or radiation, and the presence of electric or magnetic fields. Additionally, the type of solvent used can also influence the reaction. In general, any factor that affects the balance of the reactants and products in a chemical reaction can cause stress or disturbance.

A chemist has 200 mL of a 10% sucrose solution. If she adds x milliliters of a 40% sucrose solution, what is the percent concentration of the final mixture

Answers

The final concentration of the mixture depends on the value of x.

What is value?

Value is the worth of something. It can refer to the monetary worth of an item or service, the usefulness of something, or the importance of an idea, belief, or experience. Value is a subjective concept and can vary from person to person. Generally, it is the positive attributes that an individual or group associates with something that determines its value. The economic concept of value is based on the idea that the value of a good or service is determined by its cost, supply, and demand.

The final concentration of the mixture is equal to:
(200 mL x 10%) + (x mL x 40%) / (200 mL + x mL)

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Would using king size bags of M&M's make a difference to the average "atomic mass"? Why or why not?

Answers

No, because  every M&M's is identical.

M&M's contain the same amount of protons, M&M's are the same hue. In other words, the size represents the various neutron counts.

Atoms of the same chemical element called isotopes each have a distinct mass number.

While isotopes can vary in mass, they never do so in atomic number (the amount of protons). You will use M&Ms to represent atoms because we are unable to see them. These objectives are use in M&Ms to determine the average atomic mass and to observe how different isotopes are.

In this the number show how many M&M's of that color and size are packed into that bags.

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What is iupac name of this compound

Answers

Answer:

Explanation:

The lupac name of this compound is 2-Oxohexanoic acid. This compound is composed of two oxygen atoms, six carbon atoms, and one hydrogen atom. The parent chain is made up of six carbon atoms, and the functional group is a carboxylic acid group (COOH)

Assume you expand the group of materials you have to test to include metals. The forces that hold the atoms together in a metallic solid, or piece of metal, are referred to collectively as the "electron sea. " This is because, in a metallic solid, electrons do not stay close to a single atom, rather they move through the metal quite readily. The resulting electrostatic force between the positive nuclei of the metal atoms and the negative electrons is very strong and keeps the metal in the solid state. Given this information, describe the results you would expect to observe if you performed the melting point and conductivity tests on a metal sample

Answers

If you perform a melting point test on a metal sample, you would expect to observe that the metal has a relatively high melting point compared to non-metallic materials. This is because of the strong electrostatic forces between the positive nuclei of the metal atoms and the negative electrons, which hold the metal atoms together in a tightly packed lattice structure. As a result, a large amount of energy is required to overcome these forces and melt the metal.

Metal samples are expected to be excellent conductors of heat and electricity when a conductivity test is performed on them. This is because electrons in metallic solids move through the metal fairly easily and are free to move around the lattice structure. This free movement of electrons allows heat and electricity to easily pass through the metal, making it highly conductive.

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The amount of ascorbic acid, C6H8O6. in orange juice was determined by oxidizing the ascorbic acid to dehydroascorbic acid, C6H6O6. with a known excess of l2, and back titrating the excess I2 with Na2S203. A 5.00-mL sample of filtered orange juice was treated with 50.00 mL of excess 0.01023 M l2. After the oxidation was complete, 13.82 mL of 0.07203 M Na2S203 was needed to reach the starch indicator endpoint. Report the concentration of ascorbic acid in milligrams per 100
mL

Answers

There is 2.43 mg of ascorbic acid in the 5.00-mL sample, or 48.6 mg/100 mL of orange juice.

Explanation:

For i2+na2s2o3 titration,

I2 + 2 S2O3^-2 <--> 2 I^-1 + S4O6^-2

13.82 mL of 0.07203 M Na2S2O3 was needed to reach the starch indicator end point.

Number of moles of Na2S2O3 = 13.82*0.07203= 0.9954546 millimoles.

So, number of moles of excess I2 = 0.9954546/2 = 0.4977273 millimoles.

For oxidizing the ascorbic acid to dehydroascorbic acid

C6H8O6 + I2 --> C6H6O6 + 2 H+ + 2 I-

SO 1mole of I2 read for 1 mole of C6H8O6.

Initial I2 used = 50*0.01023 = 0.5115 millimoles.

Number of moles of I2 used = 0.5115 - 0.4977273 = 0.0137727 millimoles.

Number of moles of C6H8O6 in5 ml of orange juice = 0.0137727 millimoles.

Weight of C6H8O6 in5 ml of orange juice = number of moles * molecular weight = 0.0137727 * 176 = 2.4239952 mg

In 100 ml of orange juice = 2.4239952/5) *100 = 48.479904 milligrams per 100 mL. is the answer.

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If 0.40 mole of H2 and 0.15 mole of O2 were to react as completely as possible to produce H2O, what mass of reactant would remain

Answers

The remaining mass of hydrogen that is present in the reaction is 0.20 grams.

The balanced chemical reaction can be depicted as follows:

2H2+O2---->2H2O

1 mole of Oxygen reacts with 2 moles of Hydrogen in order to produce two moles of water i.e., H2O.

0.15 moles of O2  reacts with 2 * 0.15 = 0.30 moles of H2

The moles of H2 are given i.e., 0.40 moles.

So remaining = 0.40 moles - 0.30 moles = 0.10 moles

Thus, the mass of H2 can be calculated by multiplying the number of moles with the molar mass that is expressed as follows:

Mass = moles * molar mass

Molar mass of H2= 2 g/mol

Mass of H2 remained in the reaction = 0.10 moles * 2 g/mole = 0.20 grams.

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At 298 K and 1 atm, bromine is a liquid with a high vapor pressure, whereas chlorine is a gas. This provides evidence that, under these conditions, the

Answers

At 298 K and 1 atm, bromine is a liquid with high vapor pressure, while chlorine is a gas. This proves that the intermolecular forces of bromine are greater than those of chlorine under these conditions.

At a temperature of 298 K and a pressure of 1 atm, bromine is in a liquid state due to the strong attraction between Br-Br molecules.

At the same temperature and pressure, chlorine exists in the gaseous state due to covalent bonds, while bromine has non-polar covalent bonds.

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How many protons are neutral in nitrogen?

Answers

A neutral atom of Nitrogen will have seven protons.

The symbol given for Nitrogen is N, the atomic number 7. Atomic number is equivalent to the number of protons in an atom. So, for Nitrogen, the number of protons is 7.

What is a neutral atom?

A neutral atom is an atom which consists of the same number of protons and the same number of electrons. Neutral atoms will have the equal number of protons in the nucleus as they have electrons orbiting the nucleus.

In a neutral atom, the total charge on the atom is zero. Atom has same number of protons and electrons in it. For example, neutral atom of Sodium, with atomic number 11, has 11 protons and 11 electrons in its neutral state.

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the goal of the light reaction is to make ___, an high energy electron transporter, and ____, an energy storing molecule

Answers

The goal of the light reaction is to make NADH an high energy electron transporter and ATP an energy storing molecule.

The energy storage molecule ATP and the reduced electron carrier NADPH are produced by the light-dependent processes using light energy, which is required for the subsequent stage of photosynthesis. Light reactions in plants occur in the thylakoid membranes of organelles referred to as chloroplasts.

The light reactions are largely controlled by photosystems, sizable complexes of proteins and pigments (light-absorbing molecules) that are designed to capture light. Photosystem I (PSI) and Photosystem II are the two different types of photosystems (PSII).

Both photosystems have a variety of pigments that aid in the absorption of light energy as well as a unique pair of chlorophyll molecules at the reaction center. P700 denotes the special pair of photosystem I, while P600 denotes the unique pair of photosystem II.

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It takes a water wave 5.2 seconds to travel between two docks there are 19 m apart. An observer notices that 20 crests pass the first dock in 17 seconds.

find the wavelength of the water waves.

Answers

Answer:

152.12

Explanation:

hope it helps

Kong Mali po sorry

Predict the immediate effect of the following changes on the observed cell voltage, E.
H2(g) + PbCl2(s) <–> Pb(s) + 2HCl (aq)
Delta H standard rxn > 0
Match
a) Dissolve NaOH into solution
b) Increase the temperature
c) Increase the amount of PbCl2
d) Dilute the solution by adding H2O
i) Increased E
ii) Decreased E
iii) No change in E

Answers

Dissolve NaOH into the Solution will - Increased E

Increase the temperature - Increased E

Increase the amount of [tex]PbCl_{2}[/tex] - No change in E

Dilute the solution by adding [tex]H_{2}O[/tex] - Increased E              

E= Voltage or the electromotive force generated in the cell

Dissolving NaOH will increase the conductivity and number of ions in the cell and Increases E .  Adding water also increases the presence of hydrogen and hydroxide ions in the solution and Increases E.

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if the density of hydrogen is 0.090 g l and its rate of diffusion is 5.93 times that of chlorine, what is the density of chlorine

Answers

The density of chlorine will be  3.163 g/L.

The mass of a substance per unit of volume is its density. According to Graham's law, a gas's rate of effusion is inversely proportional to its square root density. When a material's particles are concentrated in a low area, they tend to travel to the place where the concentration is highest. When we use perfume or a scented spray in one area of the room and subsequently can smell it throughout the entire space, that is a simple illustration of this process.

rate1 = H2 = 5.93

rate2 = Cl2 = 1

The molecular weight of H2 = 2.016

The molecular weight of Cl2 = x.

By Graham's Law:

5.93 / 1 = x / 2.016

35.1649 = x / 2.016

x = 70.89 g/mol

Determine gas density by volume

70.89 g / 22.414 L = 3.163 g/L

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This energy diagram shows the allowed energy levels of an electron in a certain atom or molecule: energy Use this diagram to complete the table below. Which is the ground state? (pick one) How many excited states are there? How many lines are in the absorption line spectrum? Which transition causes the absorption line at the shortest wavelength? Which transition causes the absorption line at the longest wavelength?

Answers

The transition causing the absorption line at the longest wavelength is the transition from -2 to +2.

Ground State: -2

Number of Excited States: 4

Number of Lines in the Absorption Line Spectrum: 8

Transition Causing Absorption Line at Shortest Wavelength: -3 to -2

Transition Causing Absorption Line at Longest Wavelength: -2 to +2

The ground state is the state at the bottom of the diagram, which is -2.

There are 4 excited states, which are -3, -2, +1, and +2.

There are 8 lines in the absorption line spectrum, which are the 4 transitions from the ground state to the excited states, and the 4 transitions from the excited states back to the ground state.

The transition causing the absorption line at the shortest wavelength is the transition from -3 to -2.

The transition causing the absorption line at the longest wavelength is the transition from -2 to +2.

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How many ATP's is produced in the glycolysis of 2 glucose molecules?

Answers

Answer: 4 ATP molecules is produced in the glycolysis of 2 glucose molecules

How is ATP produced?

The first stage of most carbohydrate catabolism, which is described as the breakdown of larger molecules into smaller ones, is glycolysis, which is a part of cellular respiration. Two Greek words that mean "to break down anything sweet" are the source of the word glycolysis. Two molecules of ATP are created during the breakdown of glucose and formation of pyruvate during glycolysis.

Explanation:

2 ATP are produced.

For every glucose molecule, meaning that for every 2 glucose molecules, 4 ATP will be created.

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Convert: 9.94 × 10²² molecules NH3 = ___ mol NH3

5.99 x 10⁴⁶
none of these
2.81
6.06
0.165​

Answers

Answer:

correct answer is 0.165 moles by calculation

1
4
2
What are the relative masses of a proton, neutron
and electron, given that a proton has a mass of 1?
How many protons, neutrons and electrons are
there in an atom of phosphorus, which has a proton
number of 15 and a mass number of 31?
3
Explain the terms atom and element, and include
a clear description of the relationship between the
two terms.
Explain why neutrons are important in making the
nucleus of an atom stable. You need to consider the
charges on the different subatomic particles present.

Answers

Answer:

Explanation:

A proton has a relative mass of 1. A neutron has a relative mass of 1. An electron has a relative mass of 1/1840. (accept 0)

An atom of phosphorus, which has a proton mass number of 31 has 15 protons, 15 electrons, and 16 neutrons.

Atom- The fundamental units of matter are atoms. They have a single nucleus, which is surrounded by a small number of protons and electrons.

Element- A species of atom known as an element is one that cannot decompose further. They only contain one kind of atom with the same quantity of protons.

Role of Neutron-

Neutron's charge is neutral. The element's mass is made up of protons and neutrons.

The neutrons' main function in an atom's nucleus is to contribute to the nuclear glue or binding energy that binds the nucleus itself together. Remember that protons and neutrons make up an atomic nucleus.

Positively charged protons don't get along with one another.

Neutrons are added to the structure to make up for the so-called mass deficit in order to counteract the protons' attractive forces.

In order to keep the nucleus together, the nucleons—the protons and neutrons in a nucleus—lose a little bit of mass that is transformed into binding energy.

Proton has  relative mass of 1 while   neutron has  relative mass of 1. While that of an electron has  relative mass of 1/1840.In phosphorous there are 15 electrons , protons and 16 neutrons.Atoms of same type combine to form element.Neutrons contribute to mass of atom hence change in number will make atom unstable.

What is an atom?

An atom is defined as the smallest unit of matter which forms an element. Every form of matter whether solid,liquid , gas consists of atoms . Each atom has a nucleus which is composed of protons and neutrons and shells in which the electrons revolve.

The protons are positively charged and neutrons are neutral and hence the nucleus is positively charged. The electrons which revolve around the nucleus are negatively charged and hence the atom as a whole is neutral and stable due to presence of oppositely charged particles.

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QUIZ 5: CHAPTER REVIEW The nuclear product of radioactive decay is called the daughter nuclide. True False

Answers

The nuclear product of radioactive decay is called the daughter nuclide.

True

What is radioactive?

Radioactivity is a phenomenon in which particles such as alpha, beta and gamma rays are emitted from unstable atomic nuclei. This is due to the fact that the nucleus is unstable and requires a rearrangement of its protons and neutrons. Radioactive isotopes can be found in nature, or they can be artificially created. Radioactivity has many useful applications, such as medical imaging, cancer treatments, smoke detectors, and nuclear energy. It also has some potential dangers, such as radiation exposure and the risk of nuclear disasters.

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What is the theoretical yield of water in this test reaction?

Answers

The theoretical yield of water in this reaction is 1 mole (18.015 grams) of water.

What is theoretical yield?

Theoretical yield is the amount of a product one would expect to yield from a reaction if it proceeds to completion, according to a balanced chemical equation. It is calculated by multiplying the limiting reactant by the molar ratio between the reactants and the products. The actual yield of a reaction is usually lower than the theoretical yield, due to a number of factors such as incomplete conversion of reactants to products, product losses, and impurities in the reactants. Theoretical yield is used to calculate the percentage yield of a reaction, which is the ratio of the actual yield to the theoretical yield multiplied by 100.

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Answer:

360.g water

Explanation:

How many grams of zinc metal will be produced by treating 54. 0 grams of

aluminum with a solution of zinc chloride, ZnCl,?

(A:196 g Zn)

Answers

By treating 54.0 grams of aluminum with a solution of zinc chloride, ZnCl, 328.6g/mol of zinc metal will be created.

The definition of molar mass.

The molar mass of a substance is its mass expressed in grams per mole. As shown in this video, the molar mass of a substance can be calculated by adding the molar masses of the substance's component atoms. The number of moles in the substance can then be calculated from its molar mass and converted to mass.

Balance chemical reaction,

2Al + 3ZnCl₂ → 2AlCl₃ +3Zn

Molar mass of aluminum is 27.99g/mol

Molar mass of zinc chloride is 136.29g/mol

The mole ratio of ZnCl₂ to Al is 3:2

Grams →  moles  → moles → grams

45Al × 1mol Al/27.99g Al × 3 mol ZnCl₂/2 mol Al × 136.29 g ZnCl₂/1 mol ZnCl₂

on simplification,

45×3×136.29/27.99×2 = 328.6g/mol.

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The decrease in entropy (the DS value is negative) observed for alkene addition reactions results from:

Answers

Give a succinct description of how the various alkene reactants were combined to create the same result. The most stable intermediate carbocation will arise as a result of an electrophilic proton addition in the reaction between HCl and both alkenes.

The observed product is produced in both cases by adding Cl- to the tertiary carbocation that is produced. By figuring out the physical properties of the reactants and products, negative entropy in chemical processes may also be calculated. Gas molecules are widely spaced apart and move randomly in all directions, which results in high entropy in gases. Being a liquid converting into a solid, water freezing into ice is an entropy-reducing process. Due to the molecules' reduced freedom of movement, a solid has less chaos. A negative entropy reaction occurs when hydrogen and oxygen combine to generate water.

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Smoking in bed has long been the main cause of home fires. Despite a significant decline in cigarette smoking in the last two decades, however, there has been no comparable decline in the number of people killed in home fires.Each one of the following statements, if true, over the last two decades, helps to resolve the apparent discrepancy above EXCEPT:(A) Compared to other types of home fires, home fires caused by smoking in bed usually cause relatively little damage before they are extinguished.(B) Home fires caused by smoking in bed often break out after the homes occupants have fallen asleep.(C) Smokers who smoke in bed tend to be heavy smokers who are less likely to quit smoking than are smokers who do not smoke in bed.(D) An increasing number of people have been killed in home fires that started in the kitchen.(E) Population densities have increased, with the result that one home fire can cause more deaths than in previous decades. Which of the following statements correctly identifies the decomposition reaction and describes a substance involved 1. (a) List the 5 conservation related conventions. (b) Which one of these conventions is more embracing? Give reasons for your answer in relation to ecology A movie studio keeps 240 dresses in its wardrobe for historical films. Three-fifths of them can be used for movies that take place in the 1700s and 15% of them can be used for movies in the civil war era. A. What percent of the dresses are for films set in the 1700s? B. What percent of the dresses are for films not set in the 1700s? Explain how you found your answer. C. What percent of the dresses are for films set in the 1700s or during the civil war era? Explain how you found your answer. D. What percent of the dresses are not for films set during the civil war era? Explain how you found your answer. Washington established the precedent of upholding the law during which event? Exactly 5. 00 mL aliquots of a solution containing Phenobarbital were measured into 50. 00ml volumetric flasks and made basic with KOH. The following volumes of a standard solution of Phenobarbital containing 2. 00 g/ml of Phenobarbital were then introduced into each flask and the mixture was diluted to volume: 0. 00, 0. 500,1. 000, 1. 50, and 2. 00ml. The fluorescence of each of these solutions was measured with a fluorometer, which gave volumes of 3. 26, 4. 80, 6. 41, 8. 02, and 9. 56 respectively. (a) Pot the data. (b) Using the plot from (a) calculate the concentration of Phenobarbital in the unknown. (c) Derive a least-squares equation for the data. (d) Find the concentration of Phenobarbital from the equation in (c) (e) Calculate a standard deviation for the concentration obtained in (d) A change in relative interest rates causes investment expenditures to decrease within an economy resulting in a decrease of real GDP from $38,000 to $35,000. What is the percent change in real GDP Find the quotient and remainder using synthetic division for 1 + 31 + 8x + 14 ------------------------x + 2 The quotient is The remainder is How do you graph inverse functions and relations? Find the measures of the angles 1 ,Analze the Challenges Opportunities If democracy in your society 2 What is your role to create a good democracy 3. Write and explain some indigenous democratiz Valus that exist in you community What is the purpose of the dead canary in Trifles? Which of the following is not one of the primary principles an organization should follow for successful agile software development Convert:25 decimeters=Round to the tenths.meters The integration of public schools in Little Rock did not completely end opposition to desegregation. ended opposition to desegregation. proved that desegregation of schools was not feasible. ANSWER FOR BRAINLIST AND 20 POINTS5. What idea was part of George Washington's Farewell Address? What is the role of diffusion in the dialysis process? What characteristics of the face and body show good health?What characteristics show bad health? A kingdom of living things that have cells with a nucleus, have cell walls that contain chitin, and are heterotrophs Solve the following problems using completing the SquareMartha and Miguel volunteered in a Tree Planting Program offered by the school. They also donated packs of seeds for the program. The number of Martha's seeds is represented as 2x-3 packs while Miguel's seeds is twice the number of Martha's seeds. If the product of Martha and Miguel's Pack of seed is 50, how many packs of seeds Martha and Miguel donated?[Write it on paper please ]