Answer: 27
Explanation: so if u divide the thingy from the thingy to a thingy u get a thingy
Please help
A. giving 15.0 grams of N2, how many grams of NH3 would theoretically be produced
1) The theoretical yield is 18.02 g
2) The percent yield is 67%
3) The percent yield is 55.8 %
What is the theoretical yield?The balanced reaction equation is;
N2 + 3H2 ----> 2NH3
Number of moles of N2 = 15g/28 g/mol = 0.53 moles
If 1 moles of N2 produced 2 moles of NH3
0.53 moles of N2 will produce 0.53 * 2/1
= 1.06 moles
Theoretical yield = 1.06 moles * 17 g/mol
= 18.02 g
The percent yield = 12.1/18.02 * 100/1
= 67%
The percent yield = 19.8 g/35.5 g * 100/1
= 55.8 % as shown
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the molecular formula for the simple sugar glucose is c6h12o6. which compound represents the empirical formula for glucose?
The molecular formula for the simple sugar glucose is C₆H₁₂O₆. The compound represents the empirical formula for glucose is CH₂O.
The molecular formula defined as the formula in which the atoms in the molecule is present in the fixed ratio. The empirical formula is the formula in which the atoms in the molecule are present in the lowest ratio. The empirical formula tells the simplest ratio of the atoms in the molecule or the compound.
Empirical formula = molecular formula / n
Where, the value of the n for the glucose is 6
The empirical formula for the = CH₂O
Thus, the empirical formula for the glucose is CH₂O.
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A sample of octane burns releasing 2290 J of heat to the surroundings, and the gases produced expands against a piston to do 560 joules of work. Calculate the internal energy change for this reaction.1- –2850 J2- –1730 J3- –2290 J4- +1730 J5- +2850 J
The internal energy change for this reaction is +1730 J.
What is internal energy?
Internal energy is the total energy contained within a system, including the kinetic and potential energies of its particles (atoms, molecules, ions, etc.). It is a state function that depends only on the current state of the system, including its temperature, pressure, volume, and composition.
The internal energy change (ΔU) for this reaction can be calculated using the first law of thermodynamics:
ΔU = Q - W
where Q is the heat released to the surroundings, and W is the work done by the gases.
Substituting the given values, we get:
ΔU = 2290 J - 560 J
ΔU = 1730 J
Therefore, the internal energy change for this reaction is +1730 J.
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a 1.375 g sample of sugar found seaweed, is burned completely in oxygen to give 993 g of carbon dioxide &nd 0.9519 g of water: Determine the empirical formula ofthis sugar (C: 12 gmol H: gmoL, 0.16 grmol) A. C2H7 B. CHO
C. C2H6O
D. C3H7O3
E. CH2O
The 1.375 g sample of sugar found seaweed, is burned completely in oxygen to give 1.993 g of carbon dioxide and 0.9519 g of water . The empirical formula of this sugar is C₃H₇O₃.
Moles of the C in the carbon dioxide = 1 ( 1.933/ 44)
Moles of the C in the carbon dioxide = 0.0453 mol
Moles of the H in the water = 2 ( 0.9519 / 18 )
Moles of the H in the water = 0.106 mol
Mass of the oxygen = 1.375 - (0.0453 ×12 ) - 0.016 × 1
Mass of the oxygen = 0.724 g
The moles of the oxygen = mass / molar mass
= 0.724 / 160
= 0.0453 mol
Dividing by the smallest one , we get :
C = 1
H = 2.3
O = 1
Multiplying by three , we get :
The empirical formula is C₃H₇O₃.
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How have the people in Australia been affected by rabbits in Australia? Choose all that apply Rabbits might eat farmers' crops. O Rabbits eat vegetative cover, which has caused a decreased amount of food available for grazing livestock. O Their tax dollars have been used to try to control the rabbit population. Rabbits are a food source for grazing livestock
Rabbits eat vegetative cover, which has caused a decreased amount of food available for grazing livestock, Their tax dollars have been used to try to control the rabbit population are all ways by which Australians are affected by rabbits in Australia.
History of rabbits in AustraliaRabbits were introduced to Australia by European settlers in the mid-19th century for hunting and as pets. However, their populations soon spiraled out of control, and they have since become a major environmental and agricultural pest in Australia.
The overpopulation of rabbits has caused extensive damage to Australia's native vegetation, leading to soil erosion, loss of habitats for native species, and altered ecosystems. This has had a significant impact on the environment, with many native species struggling to survive.
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Identify the color absorbed by a solution that appears the color given.
Blue=
Red=
Orange=
Green=
Blue = orange/yellow light (wavelengths around 450-500 nm) is absorbed by the solution that appears blue.
Red = green light (wavelengths around 550-600 nm) is absorbed by the solution that appears red.
Orange = blue light (wavelengths around 450-500 nm) is absorbed by the solution that appears orange.
Green = red light (wavelengths around 650-700 nm) is absorbed by the solution that appears green.
Give a short note on absorption.
Color absorption takes place because substances selectively absorb certain wavelengths of visible light, while transmitting or reflecting others. The color that we perceive is the result of the wavelengths of light that are not absorbed, but rather transmitted or reflected, and detected by our eyes. This phenomenon is commonly used in colorimetric analysis and can provide important information about the electronic structure and composition of a substance.
Hence, the answer is,
Blue = orange/yellow light
Red = green light
Orange = blue light
Green = red light
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How to write units for molar mass?
The compound's molar mass is expressed in gram per mole, or g/mol.
One mole of a specific chemical or material has a mass of 1 molar. The compound's molar mass in the unit called gram per mole, or g/mol.
Avoid mixing up the terms molecular weight and molar mass of the material. The two are not equivalent. The atomic weight of each atom in a particular molecule adds up to make up the compound's mass, while the molar mass is the result of multiplying the molecule's weight by the number of moles in the compound.
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Ignoring sign, which transition is associated with the greatest energy change? a) n = 3 to n = 5. b) n = 3 to n = 2. c) n = 2 to n = 1. d) n = 1 to n = 3
Transition is associated with the greatest energy change is n=1 to n=3 As you get to higher energy shells, the difference between becomes smaller.
What is energy shells?an arrangement of electrons in an atom according to their energy. A shell's size, capacity for holding more electrons, and electron energy all increase with the distance between it and the nucleus. Two electrons can fit into the first shell, which is closest to the nucleus. Eight electrons can fit inside the second shell. Shells have consistent, stationary energy levels. A specific amount of energy is connected to each stationary orbit or shell. The energy associated with an orbit will increase with the orbit's separation from the nucleus. Energy levels are the name given to these shells. Because each shell has subshells, this model collapses at the n=3 shell.To learn more about energy shells refer to:
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identify characteristics of a pseudo first order experiment.
A pseudo first order experiment is a kinetic study in which the concentration of one of the reactants is varied in such a way that the reaction rate appears to be first order with respect to that reactant.
Some of the characteristics of a pseudo first order experiment are:
1. Limiting reactant: The concentration of one reactant is much higher than the other reactants, and the reaction rate is determined by the rate-limiting step, which involves this limiting reactant.
2.Concentration change: The concentration of the limiting reactant is changed during the reaction and monitored over time, while the concentration of the other reactants remains constant.
3.Rate expression: The reaction rate is proportional to the concentration of the limiting reactant, which results in a first-order rate expression.
4.Reaction order: The reaction appears to be first order with respect to the limiting reactant, but the overall reaction order may be different.
5.Application: Pseudo first order experiments are used to determine the rate-limiting step in complex reactions and to study the effect of reaction conditions on the rate of a reaction.
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What is difference between cis and trans isomers?
The Cis isomers are the molecules with the same connectivity of the atoms. The Trans isomers is the molecules with the same side of the groups placed on the opposite sides of the double bond.
The Cis isomers are the molecules that have the same connectivity of the atoms. The feature is the same side of the groups placed on the same side of the double bond. The Trans isomers are the the molecules with same side of the groups placed on the opposite sides of the double bond.
Cis isomers are almost the polar compound. The Trans isomers are not the very polar one. Many of the trans isomers are the non-polar molecules.
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What is The generic name of ativan?.
The generic name of the ativan is the Lorazepam .
The Ativan, also called as by the generic name that is lorazepam, it is a type of the medication called as the benzodiazepine. The Benzodiazepines is helps by the increasing the activity of the neurotransmitter called as the GABA in the brain, that helps to reduce the anxiety and the it promote relaxation.
The intravenous form of the lorazepam is used to treat the seizures. The Lorazepam is in the class of the drugs called as the benzodiazepines. The Ativan is the benzodiazepine that is used to treat the the depression.
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500. ML of 0. 200 M HCl solution needs to be dilutied to 0. 150 M solution. How many mL water needs to be added?
To dilute the 0.200 M HCl solution to 0.150 M solution, 166.67 mL of water is needed to be added to the solution.
To dilute a solution, we can use the dilution equation:
M₁V₁ = M₂V₂
where M₁ and V₁ are the initial molarity and volume of the solution, and M₂ and V₂ are the final molarity and volume of the solution after dilution.
In this case, we are given M₁ = 0.200 M, V₁ = 500 mL, and M₂ = 0.150 M. We need to solve for V₂ to find the final volume of the solution after dilution, and then subtract V₁ from V₂ to find the amount of water that needs to be added.
0.200 M × 500 mL = 0.150 M × V₂
V₂ = (0.200 M × 500 mL) / 0.150 M
V₂ = 666.67 mL
So, the final volume of the solution after dilution should be 666.67 mL.
To find the amount of water that needs to be added, we can subtract the initial volume from the final volume:
666.67 mL - 500 mL = 166.67 mL
Therefore, we need to add 166.67 mL of water to the 500 mL of 0.200 M HCl solution to dilute it to a 0.150 M solution.
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Which statement about energy is correct? (1 point)
Energy can be classified as one of these types potential energy, kinetic energy, and chemical energy
O Energy is destroyed when a causes gasoline
O Energy can be changed from cas form to other
O Energy can be created in a power plant
Answer: Energy can be classified as one of these types potential energy, kinetic energy, and chemical energy
A number of electrical devices operate on the basis of law of conservation of energy. Energy can be changed from gas form to other. In a torch it is the chemical energy which is converted into heat and light energy. The correct option is B.
What is law of conservation of energy?The law of conservation of energy states that the energy can neither be created nor be destroyed. Although it can be transformed from one form to another. The total energy of an isolated system always remains constant. All forms of energy follow the law of conservation of energy.
In a closed system which is defined as a system that is isolated from its surroundings, the total energy of the system is conserved. So in an isolated system like universe, if there is a loss of energy then there must be a gain of an equal amount of energy.
Although this principle cannot be proved.
Thus the correct option is B.
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What is the VSEPR geometry of the carbon?
Carbon has a tetrahedral geometry, and this information is important in determining the chemical and physical properties of the molecule in which carbon is present.
The VSEPR (Valence Shell Electron Pair Repulsion) theory is a model used to predict the geometry of molecules based on the arrangement of electron pairs around the central atom. In the case of carbon, its electronic configuration is 1s² 2s² 2p², which means that it has four valence electrons in its outermost shell.
Carbon typically forms four single covalent bonds, which implies that it has four electron pairs around it. The geometry of carbon will be tetrahedral, as it has four electron pairs around it, all of which repel each other and seek the maximum possible distance from each other.
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What are the reaction rate factors?
Describe the structure and bonding in silicon dioxide and explain why it is a suitable material for making welding blankets.
The molecular geometry of silicon dioxide is linear and bonding in it is covalent due to which it is a suitable material for making welding blankets.
What is molecular geometry?Molecular geometry is defined as a three -dimensional arrangement of atoms which make up the molecule.It includes parameters such as bond length,bond angle and torsional angles.
It influences many properties of molecule such as reactivity,polarity color,magnetism .The molecular geometry can be determined by various spectroscopic methods and diffraction methods , some of which are infrared,microwave and Raman spectroscopy.
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what amino acid performs the nucleophilic attack during the chymotrypsin mechanism?
The Ser is an amino acid that participates in the chymotrypsin mechanism's nucleophilic assault.
What is an amino acid?Both amino and carboxylic acid functional groups can be found in amino acids, which are organic molecules. Alpha-amino acids, which make up proteins, are by far the most significant amino acids, even though there are hundreds of them in nature. In the genetic code, there are only 22 alpha amino acids. Amino acids are the atomic units of protein synthesis. Proteins and amino acids serve as the foundation of life. Amino acids are the byproducts of protein digestion or breakdown. Amino acids are converted into proteins in the human body, which aids in the process of digestion. The fundamental components of proteins are amino acids. A carboxylic group and an amino group are both present in their molecule.To learn more about amino acid refer to:
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Oxalic acid is a compound used in paints. A sample of oxalic acid was found to contain 1.94 g of carbon, 0.160 g of hydrogen and 5.16 g of oxygen. The molar mass of oxalic acid is 90.0 g/mole. Determine the empirical formula and the molecular formula of this compound. (show work: use labels)
The empirical formula of oxalic acid is CHO₂. The molecular mass is 90 g/mol. Then, its molecular formula is C₂H₂O₄.
What is empirical formula ?The empirical formula of a compound is derived from the number of moles of each element present and converting their ratio of number of moles into whole numbers.
The molecular formula is derived by dividing the molecular mass by the formula mass and multiply the empirical formula with the obtained integer.
Given mass of carbon =1.94 g
no.of moles = 1.94/12 = 0.161
mass of H = 0.160
no.of moles = 0.160
mass of oxygen = 5.16 g
no.of moles = 5.16 g/16 = 0.322
Now, divide the ratio by 0.160 to convert them to whole numbers, we get the empirical formula CHO₂.
Given molar mass = 90 g/mol
Formula mass = 12 + 1 + 32 = 45 g
then, 90/45 = 2
multiply the formula mass by 2 we get the molecular formula, C₂H₂O₄.
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What is the type of polyester that gets formed in the reaction between glycerol and phthalic anhydride?
The type of polyester that is formed in the reaction between glycerol and phthalic anhydride is known as glyceryl phthalate, or GP for short.
GP is a condensation polymer that is formed by the reaction of glycerol and phthalic anhydride. The reaction involves the formation of ester bonds between the hydroxyl groups of glycerol and the carboxylic acid groups of phthalic anhydride. The resulting polymer has good flexibility, softness, and low toxicity, which make it useful for certain applications, such as in the production of plasticizers for PVC.
However, glyceryl phthalate is not as widely used as other polyesters like polyethylene terephthalate (PET), which is formed from the reaction of ethylene glycol and terephthalic acid, and has much broader applications.
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Each different signal in a 1H NMR spectrum represents a different__________of hydrogen atom. Hydrogen atoms that are_______________give the same signal.
Each different signal in a 1H NMR spectrum represents a different chemical environment of hydrogen atom. Hydrogen atoms that are in the same chemical environment or have the same electronic and structural environment give the same signal in the NMR spectrum.
Write a note on this phenomenon of the NMR spectrum.
This is because the resonance frequency of a hydrogen nucleus is affected by the local magnetic field, which in turn is influenced by the electronic and structural properties of the molecule surrounding the hydrogen atom. By analyzing the number, intensity, and splitting pattern of the signals in the 1H NMR spectrum, it is possible to obtain valuable information about the structure and composition of a molecule or compound.
Hence, the answer is, Each different signal in a 1H NMR spectrum represents a different chemical environment of hydrogen atom. Hydrogen atoms that are in the same chemical environment or have the same electronic and structural environment give the same signal in the NMR spectrum.
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the bonds connecting adjacent nucleotides in a nucleic acid is called ?
The bonds connecting adjacent nucleotides in a nucleic acid is called phosphodiester bond.
The phosphodiester bond is the connection between two nucleotides that follow one another within the same DNA strand. Deoxyribose in DNA and ribose in RNA form the phosphodiester bond, which connects the 3' carbon atom of one sugar molecule to the 5' carbon atom of another.
The 3', 5' phosphodiester linkage is specifically formed by the phosphodiester connection between the 3' carbon atom of one sugar molecule and the 5' carbon atom of another. These saccharide groups come from ribose and deoxyribose, which are found in both DNA and RNA.
Within each strand, the nucleotides are joined by covalent bonds.
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For the element nitrogen (N), answer the following questions.
a. Is there one atomic number possible for N, or multiple possibilities? What is/are the atomic number(s) for N? What type(s) of subatomic particle(s) correspond to the atomic number?
b. Is there one mass number possible for N, or multiple possibilities? What is/are some mass number(s) for N? What type(s) of subatomic particle(s) correspond to the mass number? If there are two atoms of an element with different mass numbers, what are they called
c. Is there one atomic mass for N, or multiple possibilities? What is/are the atomic mass(es) for N?How is atomic mass calculated for an element?
Answer:
a. There is only one atomic number possible for nitrogen (N), which is 7. The atomic number represents the number of protons in the nucleus of an atom. The type of subatomic particle corresponding to the atomic number is the proton.
b. There are multiple possibilities for the mass number of nitrogen. The mass number is the sum of the number of protons and neutrons in the nucleus of an atom. Nitrogen can have different isotopes, which are atoms of the same element that have different mass numbers due to having different numbers of neutrons in their nuclei. Some common mass numbers for nitrogen include 14 and 15. The type of subatomic particle corresponding to the mass number is the neutron. When two atoms of an element have different mass numbers, they are called isotopes.
c. There are multiple possibilities for the atomic mass of nitrogen. The atomic mass is the weighted average of the masses of all the isotopes of an element, taking into account their relative abundances. The most common isotope of nitrogen is 14N, which has an atomic mass of 14.00674 u (unified atomic mass units). Other isotopes of nitrogen include 15N, which has an atomic mass of 15.00011 u. The atomic mass of an element is calculated by summing the masses of all of its isotopes and weighting them according to their relative abundances.
Why do you add boiling solvent to a sample to recrystallize rather than just adding your sample to boiling solvent? give, at least two reasons.
In the event that there is too much solvent present, the solution can become too diluted for crystals to form.
Hence, the phone you're using must be hot and boiling for crystallisation to take place or for crystals to form. The solvent's boiling point should be between 50 and 120 °C. Impurities should either be insoluble in the hot solvent or soluble in the cool solvent.
There must be no interaction of the drug or solvent. The solvent's boiling point needs to be lower than the compound's melting point. The purified substance shouldn't react with a good recrystallization solvent; instead, it should dissolve somewhat at high temperatures and significantly at low temperatures.
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How much energy does the water in this experiment absorb according to the calorimeter data
Heat capacity is an extensive property because its value depends on the quantity of the material present. The energy absorbed by water is 20,900 J .
What is specific heat capacity?The specific heat capacity of a substance is defined as the amount of heat required to raise the temperature of 1 gram of the substance through 1°C.
The heat required to raise the temperature of a sample of mass 'm' having specific heat 'c' from T₁ to T₂ is given as:
q = mc (T₂ - T₁)
200.0 × 4.18 (45.1 - 20.1)
q = 20,900 J
Thus the water absorbs 20,900 J of energy.
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Answer:
20950
Explanation:
The amount of energy absorbed by water can be calculated using the formula:
q = m * c * ΔT
where q is the energy absorbed (in Joules), m is the mass of water (in grams), c is the specific heat of water (in Joules/gram °C), and ΔT is the change in temperature (in °C).
In this case, we have:
m = 200.0 g
c = 4.18 J/g°C
ΔT = 45.1°C - 20.1°C = 25.0°C
Therefore, the amount of energy absorbed by the water is:
q = 200.0 g * 4.18 J/g°C * 25.0°C
= 20,950 J
So the water in this experiment absorbed 20,950 Joules of energy
Proton A couples to Proton B. Proton A posseses a J -value of 3.0 Hz. What do you expect the J -value Proton B posseses to be? 3.0 Hz Greater than 3.0 Hz Less than 3.0 Hz No J -value because coupling is only one-way
Proton A couples to Proton B. Proton A posseses a J -value of 3.0 Hz. What do you expect the J -value Proton B posseses to be 3.0 Hz. The correct answer is D.
In freely rotating groups, protons in anti-conformation have a frequency range of J= 5–12 Hz while those in gauche conformation have a range of J= 2-4 Hz. Option D is correct as a result.
What is the proton's J-value?The J value of a quartet may always be determined by counting the distances between the various lines. When working with actual data, it is preferable to utilize the average line spacing, which is determined by dividing the distance between the first and last lines by three.
The coupling constant, usually denoted as J, is used to calculate the strength of the interaction between a pair of protons in an atom.
It is designated by the letter "J" with frequency units and is mostly used to measure the interaction or strength of the splitting effect (Hz).
In the simplest case, the coupling constant for a doublet is equal to the difference between its two peaks.
As a result, Proton B has a J-value of 3.0 Hz.
Your question is in complete but most probably your full question was
Proton A couples to Proton B. Proton A posseses a J-value of 3.0 Hz. What do you expect the J-value Proton B posseses to be? a) Less than 3.0 Hz b) Greater than 3.0 Hz c) No J-value because coupling is only one-way d) 3.0 Hz
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How many millimole in 1 mole?
The unit conversion helps to calculate the one mole quantity in milimoles. It will contain thousands of milimoles.
A mole is the amount of a substance of a system that contains as many elementary entities as there are atoms in 0.012 kilograms of carbon 12; its symbol is "mole." The SI prefix "mili" represents a factor of 10⁻³ or, in exponential notation, 1E⁻³. So 1 millimole = 10⁻³ moles. Both are different units of the same quantity. A unit conversion used to express the same property as other units of measurement. A conversion factor, which is a number, is used to convert a quantity from one unit to another. The conversion formula for converting millimoles to 1 mole is written as : millimole = moles / 1000
This means that one millimole contains 10⁻³ moles. Therefore, one mole contains 1000 millimoles.
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The student added excess copper oxide. Describe the steps that the student could include in the method to find the mass of copper oxide that reacted. (5 marks)
To find the mass of copper oxide that reacted, the student could follow these steps given in the explanations.
How can mass of copper reacted be found?Weigh an empty crucible and record the mass.Add a known amount of copper oxide to the crucible and record the total mass.Heat the crucible and the contents with a Bunsen burner until the reaction is complete. This should be done in a fume cupboard.Allow the crucible and its contents to cool to room temperature.Weigh the crucible, its contents and the product that formed, and record the mass.Subtract the mass of the empty crucible from the mass of the crucible with the product to find the mass of the product formed.Calculate the mass of copper oxide that reacted by subtracting the mass of the product formed from the total mass of copper oxide added to the crucible.It's important to note that safety precautions must be followed when handling and heating chemicals, and that the method may need to be modified depending on the specific materials and equipment used in the experiment.Learn more on methods to find mass here: https://brainly.com/question/29791625
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name the long, straight-chain type of starch that makes up about 20% of digestible starch.
Sucrose is long, straight-chain type of starch that makes up about 20% of digestible starch.
Sucrose, a disaccharide, is a sugar made out of glucose and fructose subunits. It is created normally in plants and is the primary constituent of white sugar. It has the atomic equation C₁₂H₂₂O₁₁.
For human utilization, sucrose is extricated and refined from one or the other sugarcane or sugar beet. Sugar plants - commonly situated in tropical districts close where sugarcane is developed - squash the stick and produce crude sugar which is delivered to different production lines for refining into unadulterated sucrose. Sugar beet production lines are situated in mild environments where the beet is developed, and process the beets straightforwardly into refined sugar.
Starch or amylum is a polymeric sugar comprising of various glucose units joined by α- - D glycosidic bonds. This polysaccharide is delivered by most green plants for energy capacity. Around the world, it is the most considered normal starch in human weight control plans, and is contained in huge sums in staple food sources like wheat, potatoes, maize, rice, and cassava.
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What if you had rubber bands, wood chips, straight pins, aluminum foil, and glass beads? Using a property of matter, classify these objects. Show your results in a table
Here's a table that classifies the objects based on their physical properties:
Object Property
Rubber bands Elasticity
Wood chips Hardness
Straight pins Sharpness
Aluminum foil Malleability
Glass beads Smoothness
What are physical properties?Physical properties are characteristics that describe the basic nature of an object, such as its shape, size, texture, and other observable features, without reference to its composition.
The physical properties listed in the table are just a few examples of the ways in which these objects can be described and classified based on their physical characteristics.
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What makes OH a good leaving group?
The presence of a lone pair on the oxygen atom makes OH a good leaving group.
A good leaving group is a molecular fragment that can depart from the substrate without undergoing rearrangement or reacting further. In general, the ability of a group to act as a leaving group depends on its stability after leaving. The stability of a leaving group is often enhanced by the inductive and resonance effects of nearby functional groups.
In the case of OH, its lone pair can act as a nucleophile and participate in reactions, but it can also be delocalized via resonance with the adjacent atoms. However, upon protonation, the O-H bond becomes polarized and the oxygen atom becomes a better leaving group.
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