family of macromolecules are composed of carbon, hydrogen and oxygen in a 1:2:1 ratio and includes sugars, starches, glycogen, and cellulose. multiple choice question. protein lipid nucleic acid carbohydrate need help? review these concept resources.

The statement is true, a chemist has three compounds of similar molecular weight, but with different dominant intermolecular forces.

A compounds with weaker intermolecular forces should have a lower boiling point compared to a compound with stronger intermolecular forces. Boiling point is directly proportional to the strength of intermolecular forces in a substance. The dominant intermolecular force in a substance determines the strength of these forces and thus affects the boiling point. For example, if one of the compounds has weak dispersion forces as its dominant intermolecular force, it should have the lowest boiling point compared to compounds with stronger forces such as hydrogen bonding or ionic bonding.

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As per the given reaction 2 moles or 64 g of S produces  moles or 196 g of sulphuric acid. Hence, mass of sulphur needed to produce 2.7× 10¹⁴ g of sulphuric acid is 8.8 × 10¹³ g.

Sulphuric acid is a very strong acid having very much industrial and laboratory significance. It is industrially produced by the combination of sulfur and oxygen gas.

From the balanced equation, it is clear that, 2 moles of S gives 2 moles of sulphuric acid.

molar mass of sulphuric acid = 98 g/mol

mass of 2 moles = 196 g.

mass of S = 32 g

mass of 2 moles of S = 64 g.

Then the mass of S required to produce 270 million tones of sulphuric acid is :

( 2.7× 10¹⁴ g × 64)/196 g = 8.8 × 10¹³ g.

Therefore, the mass of S required to 270 million tones of sulphuric acid is 8.8 × 10¹³ g.

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sulfur dioxide. The scrubber is an apparatus installed in a coal-fired power plant to clean the passing gas through the smokestack.

In order to lessen acid rain, there are additional methods in use that really can extract sulfur dioxide in waste gases.These procedures, known as "sulfur scrubbing," can remove and over 95% of the sulfur dioxide present in waste gases.

Utilizing less sulfuric coal is one option.The coal can also be "washed" to get some of the sulphur out.Scrubbers are a piece of machinery that the power plant can add to remove sulfur dioxide from waste gases the smokestack.

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Considering the definition of atomic mass, isotopes and atomic mass of an element, the isotopic mass of the least abundant isotope is 23.5526 u.

The number of protons and neutrons determine the mass number of an element.

An isotope is an atom that belongs to the same chemical element as another and has the same atomic number, but a different atomic mass. That is, isotopes have the same number of protons as normal atoms, but a different number of neutrons.

The atomic masses of chemical elements are usually calculated as the weighted average of the masses of the different isotopes of each element, taking into account the relative abundance of each of them.

In this case, you know:

Then, the isotopic mass of the least abundant isotope (mass) can be calculated as:

22.573 u×0.75806 + mass ×0.24194= 22.810 u

Solving:

22.573 u×0.75806 + mass ×0.24194= 22.810 u

mass ×0.24194= 22.810 u - 22.573 u×0.75806

mass= (22.810 u - 22.573 u×0.75806)÷ 0.24194

mass= 23.5526 u

Finally, the least abundant isotope has a mass of 23.5526 u.

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The theoretical yield of the reaction is 0.26 g.

Stoichiometry is the branch of chemistry that deals with the quantitative relationships between reactants and products in a chemical reaction. It involves the calculation of the amount of reactants needed to produce a certain amount of product, or vice versa. The stoichiometric coefficients in a balanced chemical equation represent the ratio of the moles of reactants to the moles of products in the reaction.

For trail 1- Mass of Mg = 26.985 - 26.679 = 0.306 g

Mass of MgO = 27.178 - 26.679 =  0.499 g

The Number of moles of Mg = 0.306 g/24 g/mol

= 0.013 moles

2 moles of Mg gives 1 mole MgO

0.013 moles will give 0.013 moles  * 1 mole/2 moles

= 0.0065 moles

Mass of the MgO = 0.0065 moles * 40 g/mol

= 0.26 g

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In a polar covalent bond, two atoms share electrons unequally, while in a non-polar covalent bond, atoms are split equally between two atoms.

There аre two types of covаlent bonds: polаr аnd nonpolаr. In а polаr covаlent bond, the electrons аre unequаlly shаred by the аtoms becаuse they аre more аttrаcted to one nucleus thаn the other. The relаtive аttrаction of аn аtom to аn electron is known аs its electronegаtivity: аtoms thаt аre more аttrаcted to аn electron аre considered to be more electronegаtive.

Nonpolаr covаlent bonds form between two аtoms of the sаme element or between different elements thаt shаre electrons equаlly. For exаmple, moleculаr oxygen ([tex]O_{2}[/tex]) is nonpolаr becаuse the electrons will be equаlly distributed between the two oxygen аtoms. The four bonds of methаne аre аlso considered to be nonpolаr becаuse the electronegаtivies of cаrbon аnd hydrogen аre neаrly identicаl.

Your question is incomplete, but most probably your full question was

In a _____, two atoms share electrons unequally, while in a _____, atoms are split equally between two atoms.

Thus, the correct answers are polar covalent bond; non-polar covalent bond

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An acid with a pKa value of 13 is the stronger acid. This is because the lower the pKa value, the stronger the acid is.

The strength of an acid is determined by its dissociation constant (Ka) or the negative logarithm of the dissociation constant (pKa). The lower the pKa value, the stronger the acid. A higher dissociation constant indicates a stronger acid, as the acid will dissociate more readily in solution and release more hydrogen ions. The dissociation constant can be used to calculate the pH of a solution, which is a measure of the concentration of hydrogen ions in the solution.

Therefore, an acid with a pKa of 13.5 is a weaker acid than an acid with a pKa of 13, as the latter has a lower pKa value. This means that the acid with a pKa of 13 will dissociate more readily in solution and release more hydrogen ions, making it the stronger acid.

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The results of an experiment are represented in tables, charts, or graphs and its hypothesis is discussed during the "analysis" phase of the scientific method.

The scientific method is a systematic approach to conducting experiments and solving problems. It is a step-by-step process that starts with a question or problem and ends with a conclusion or solution. During the analysis phase of the scientific method, the results of the experiment are analyzed and interpreted. This includes representing the results in tables, charts, or graphs to make them easier to understand. The hypothesis, which is a tentative explanation for the problem or question being studied, is also discussed during this phase. In the analysis phase, the data is evaluated to determine if the hypothesis is supported or not. If the hypothesis is supported, it is considered to be confirmed, but if it is not supported, it is considered to be falsified. The analysis phase is an important step in the scientific method because it allows the researcher to draw meaningful conclusions from the data and make decisions based on the results of the experiment.

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The correct option is B, I = 1.1 ppm, II = 3.2 ppm, III = 1.4 ppm, IV = 0.9 ppm this compound is a correct prediction of the chemical shifts for the signals in the 1h nmr spectrum.

Spectrum refers to the range of different frequencies that make up different forms of electromagnetic radiation, such as radio waves, microwaves, infrared radiation, visible light, ultraviolet radiation, X-rays, and gamma rays. The electromagnetic spectrum is often visualized as a continuous range of frequencies from low to high, with each frequency corresponding to a different type of electromagnetic radiation.

In practice, the spectrum is divided into different regions based on the frequency of the radiation and its properties, with each region having different uses and applications. For example, radio waves are used for communication technologies like cell phones and Wi-Fi, while X-rays are used for medical imaging and radiation therapy. Understanding the electromagnetic spectrum is important for developing new technologies, as well as for understanding the behavior of matter and energy in the universe.

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Complete Question:-

Which of the following is a correct prediction of the chemical shifts for the signals in the H NMR spectrum for the following compound?A. I = 0.9 ppm, II = 2.7 ppm, III = 1.2 ppm, IV = 0.9 ppm B. I = 1.1 ppm, II = 3.2 ppm, III = 1.4 ppm, IV = 0.9 ppm C. I = 0.9 ppm, II = 1.7 ppm, III = 1.2 ppm, IV = 1.1 ppm D.I = 0.9 ppm, II = 1.9 ppm, III = 3.4 ppm, IV = 0.9 ppm E. none of the these

The four molecules in ascending strength of in order. ethanol, dichloromethane, ethyl acetate, water, and ethylene glycol

Solvents' polarity indices can be used to identify how polar they are. The capacity of the solvent to interact with various polar test solutes is measured by the polarity index.

With a polarity index of 2.8, diethyl ether is the least polar substance.

With a 3.1 polarity index, dichloromethane

4.3 on the polarity index of ethyl acetate

With a polarity index of 5.2, ethanol is the most polar substance.

These solvents' different polarity are caused by variances in their structural makeup. Because they include bonds between elements with vastly differing electronegativities, such oxygen and hydrogen, polar solvents exhibit enormous dipole moments.

Diethyl ether is less polar than dichloromethane, which has two electronegative chlorine atoms bound to a carbon atom, since it contains two non-polar methyl groups. Similarly, diethyl ether has a greater dipole moment than dichloromethane because it comprises two highly electronegative oxygen atoms bonded to carbon. Given the solvents, ethanol is the most polar because it possesses the oxygen hydrogen bond with the biggest dipole moment.

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Note: The correct question would be as bellow,

Put the four molecules in order based on increasing imf strength

water

ethylene glycol

ethanol

diethyl ether

The constant, or factor kept the same throughout the experiment, was the method used to form the bubbles.

An experiment is described as a procedure carried out to support or refute a hypothesis, or determine the efficacy or likelihood of something previously untried.

Diego combined 1 liter of water with 200 milliliters of liquid detergent to make a bubble solution after which he placed an equal amount of this solution into 5 separate bowls.  

Diego used a bubble-blowing machine in a temperature-controlled room to make bubbles of each kind separately.

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The following groups of organelles contain hydrolases, catalase, and detoxifying enzymes for drugs: lysosome, peroxisome, and smooth endoplasmic reticulum.

Lysosomes contain hydrolases, which are enzymes that break down various biomolecules including proteins, carbohydrates, and lipids. They also contain detoxifying enzymes that can break down drugs and other harmful substances.

Peroxisomes contain catalase, an enzyme that breaks down hydrogen peroxide, a toxic byproduct of cellular metabolism, into water and oxygen. Peroxisomes also contain detoxifying enzymes for drugs and other harmful substances.

The smooth endoplasmic reticulum (SER) also contains detoxifying enzymes for drugs and other toxic substances. These enzymes can modify the structure of the drugs and make them easier to excrete from the cell.

Overall, these organelles play a crucial role in cellular detoxification and help protect the cell from damage caused by toxic substances, including drugs.

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In the heavens above the earth, Alkaid and Merak are 25.60 light years apart.

A light-year measures distance rather than time (as the name might imply). The distance a light beam covers on Earth in one year, or around 6 trillion miles, is measured in light-years.

It seems to be a connect-the-dots picture on a piece of paper when viewed from Earth. The Big Dipper, however, would not appear flat at all if viewed from a different perspective. In reality, none of the stars in the Big Dipper are close to one another. Some are located seven times away from others. Dubhe and Merak, the Big Dipper's two end stars, are separated by nearly exactly 5 degrees.

The Ursa Major Moving Group's five stars—Mizar, Merak, Alioth, Megrez, and Phecda—are all within "just" a few light-years of each other at a distance of around 80 light-years, with Mizar being the closest at 78 light-years and Phecda being the furthest away at 84 light-years.

In this diagram, point A represents the location of Earth, point B the location of the Sun, point C the location of Merak, and point D the location of Alkaid. Alkaid, which is 104 light-years away, and Dubhe, which is 123 light-years away, are not only far farther away from us than the other stars, but they are also traveling in completely different directions.

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the following molecules Unique Carbons is : a 1    b 1    c 6   d 7   e 8   f 9.

Carbon atoms are special because they can join to form extraordinarily long, strong chains that can contain different-sized branches or rings and frequently have tens of thousands more carbon atoms.Similar chains can be created by silicon and just few other elements, although they tend to be much shorter and less robust.

With chemical formula C6H6, benzoene is a significant organic chemical compound. Its molecule is made up of 6 carbon atoms arranged in a ring, with 1 hydrogen atom connected to each carbon atom.

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Drugs that are given chronically, drugs that are highly protein-bound, and drugs with a narrow therapeutic window with well-defined effective and toxic concentrations are good candidates for therapeutic drug monitoring (TDM). TDM is not useful if the effective and toxic concentrations are not well-defined and there is no reference for comparison.

Therapeutic drug monitoring (TDM) is a process used to monitor the effectiveness and safety of medications. TDM is typically used for drugs that are given chronically and for drugs that are highly protein-bound. Drugs that are highly protein-bound are good candidates for TDM because changes in plasma binding proteins can affect drug levels, making it important to monitor these levels to ensure they remain in a therapeutic range. On the other hand, drugs that have low toxicity and rare side effects are unlikely to need TDM. Additionally, TDM is not useful if the effective and toxic concentrations of a drug are not well-defined as there is no reference for comparison.

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HI(g) is not a catalyst, but it is an activated complex and a reaction intermediate. When H2(g) and ICl(g) react, the activated complex HI(g) is formed, and it acts as an intermediate in the reaction.

When hydrogen (H2) and ICl (iodine chloride) react, the activated complex HI (hydrogen iodide) is formed and acts as an intermediate in the reaction. This intermediate is what allows the reactants to react and produces the products of the reaction.

HI is not a catalyst, but it helps facilitate the reaction by providing a pathway for the reaction to take place.

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Most elements occur in compounds combined with other elements by forming chemical bonds, which are formed by the interaction of the electrons of the atoms involved.

Chemical bonds are forces that hold atoms together to form molecules. There are several types of chemical bonds, including covalent bonds, ionic bonds, and metallic bonds, among others. The type of bond formed between two or more atoms depends on the electronegativity of the atoms involved and the nature of the interaction between their electrons.

In covalent bonds, atoms share electrons to form a shared electron pair and form a covalent bond. Covalent bonds are usually formed between atoms with similar electronegativities, and the bond is strongest when the electrons are shared equally between the atoms.

Ionic bonds, on the other hand, are formed when one atom donates an electron to another atom to form ions. Ionic bonds are typically formed between atoms with significantly different electronegativities, and the bond is strong because of the strong attraction between the positively charged ion and the negatively charged ion.

Metallic bonds are formed between metal atoms and involve the sharing of electrons between metal atoms to form a metallic lattice structure. The electrons in metallic bonds are delocalized, which means they are not associated with a single atom but are shared by all the metal atoms in the lattice.

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The solution to the system of linear equations is x = 6, y = x / 3 - 1 = 1, z = 1, and w = 0.

To solve this system of linear equations using Gauss elimination, we first write the augmented matrix of the system:

\begin{bmatrix}

1, 2, -1, 1 &, 1 \

4 & -2 & -2 & 4 & 10 \

6 & 2 & 4 & 8 & 12 \

1 & -3 & 1 & 1 & 3 \

0 & 0 & 0 & 3 & 0

\end{bmatrix}

We can use row operations to reduce the matrix to a row echelon form, and then to a reduced row echelon form:

\begin{bmatrix}

1, 2, -1, 1,  1 \

0 & -6 & -5 & 7 & 10 \

0 & 10 & 11 & 16 & 22 \

0 & -3 & 1 & 1 & 3 \

0 & 0 & 0 & 3 & 0

\end{bmatrix}

\begin{bmatrix}

1, 2, -1,  1, 1 \

0 & -6 & -5 & 7 & 10 \

0 & 0 & 11 & 14 & 18 \

0, 0, 1,2, 3 \

0 & 0 & 0 & 3 & 0

\end{bmatrix}

\begin{bmatrix}

1, 2, -1, 1, 1 \

0 & -6 & -5 & 7 & 10 \

0 & 0 & 11 & 14 & 18 \

0 & 0 & 0 & 3 & 3 \

0, 0, 0, 0, 0

\end{bmatrix}

From the reduced row echelon form, we can solve for the variables in order, starting from the last equation:

w = 0

z = 3 / 3 = 1

y = (3 - x + y) / -3 = -1 + x / 3

x + 2(-1 + x / 3) - 1 + 0 = 1

x = 6

The solution to the system of linear equations is x = 6, y = x / 3 - 1 = 1, z = 1, and w = 0.

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The complete question is

Use Gauss elimination to solve the following systems of linear equations. If the system has infinitely

many solutions, express the solutions in terms of the parameter(s). In the case of no solution, just say so.

+ 2y – 2 + w = 1 4x – 2y – 2z + 4w = 10 6x + 2y + 4z +8w = 12 2 – 3y +3w= 0

x - 3y + 2+ w=3 6x – 2y + 2x + 2w = 2 8x – 8y + 4x + 5w = 8.

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As per the given balanced chemical equation of the reaction between hydrogen gas  and CO gas  1 mole or 28 g  of CO  needs 2 moles or 4 g hydrogen gas Then,6.19 grams of hydrogen gas requires  43.3 g of CO.

Methanol is an organic compound called an alcohol. It can be synthesized by passing carbon monoxide gas through hydrogen gas.  The balanced chemical equation of their reaction is given here.

It is clear that, 2 moles of hydrogen gas requires1 mole CO gas for complete reaction.

mass of 2 moles of hydrogen gas = 4 g

molar mass of CO = 28 g/mol

Then mass of CO gas required to react with 6.19 g of hydrogen gas is :

mass of CO = (6.19 × 28 ) / 4 = 43.3 g.

Therefore, as per the given equation, 43.3 g of CO is required to react with 6.19 g of  hydrogen gas.

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The amount of time required for concentration of NO2 to drop from 2.98 mol/L to 0.620 mol/L equals 4.96 min.

The proportional constant in the equation which defines the link between both the rate of the reaction & the concentrations of a reacting chemicals is known as the rate constant, also known as the specific rate constant.

The following equation provides the reaction's rate:

rate = k[NO2]

Because the reaction in NO2 is second-order, we can write:

(1/[NO2])d[NO2]/dt = k[NO2]

We obtain, (1/k) after rearranging and integrating.

dt = d[NO2]/[NO2]

The time required for the concentration to decrease from 2.98 mol/L to 0.620 mol/L is given by:

t = (1/k) ln([NO2]initial / [NO2]final)

= (1/3.40) ln(2.98/0.620)

= 4.96 min.

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The following which best explains why more contaminants are leached when solid waste is crushed into small particles and put in contact with water than when the particles are large is that smaller particles have a larger surface area per unit volume than larger particles.

This is referred to as a biological, chemical, physical or radiological substance that becomes harmful for humans or living organisms.

Smaller particles have a larger surface area per unit volume than larger particles which is why more contaminants are easily leached.

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The student combines 100 molecules of A and 100 molecules of B to make 100 molecules of AB. Therefore, to make 5000 molecules of AB, the student would need 5000/100= 50 times the amount of A, or 50 * 100 = 5000 molecules of A.

The reaction of chemicals A and B to synthesize product AB can be represented by the chemical equation A + B → AB. This means that for every molecule of A and B that react, one molecule of AB is produced. In the scenario given, the student combines 100 molecules of A and 100 molecules of B to obtain 100 molecules of AB. To make 5000 molecules of AB, the student needs to increase the amount of A accordingly. Using the ratio of the initial reaction, we can determine that 50 times the initial amount of A (100 molecules) would be required to synthesize 5000 molecules of AB. Therefore, the student would need 5000 molecules of A.

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Complete question:

A student needs to conduct a reaction that combines chemicals A and B to synthesize product AB. If we write this as a chemical equation it looks like: A +B → AB If this student combines 100 molecules of A and 100 molecules of B, the student obtains 100 molecules of AB. How many molecules of A would this student need to make 5000 molecules of AB? (Assume the student had enough of molecule B to make 5000 molecules of AB.) Express your answer as an integer

Based on the positions in the periodic table, the atoms arranged in the order of their increasing radius - Cl < Si < Ca < Sr.

The distance between the valence shell and the nucleus is known as the atomic radius. The internuclear distance between two atoms is divided in half to obtain the measurement.

When an atom's energy level rises, it signifies that the number of its shells is growing, which causes the valence shell to migrate away from the nucleus and increase the atomic radius. The energy level and atomic radius rise in the periodic table from top to bottom as you descend.

In the periodic table, the proton number rises as you move from the left to the right of an era. As this number rises, the nucleus becomes stronger and will hold the electrons closer together, resulting in a smaller radius. The atomic radius accordingly lowers as you move from left to right in a period.

The atoms are first organised into groups based on their time. They will be arranged in each time according to their group number.

Fifth period is where Sr is.

Fourth period has Ca.

In the third period, Si is on Group 14 and Cl is on Group 17, respectively.

The atomic radius grows along with the period. The third period is therefore where we start, followed by the fourth, and finally the fifth. In the third period, the radius decreases as the proton number increases. We therefore begin with Cl and then Si.

So, the order is Cl < Si < Ca < Sr.

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Answer:lol

Explanation:

kool

The statement that is false is that a catalyst cannot affect the overall energy change for the reaction.

While catalysts are present before and after a reaction, they can affect the energy change since they can provide a different reaction pathway with a lower activation energy.

Catalysts can provide a different reaction pathway with a lower activation energy, which can affect the energy change of the reaction. This means that while a catalyst is present before and after a reaction, it can still affect the energy change of the reaction.

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The amount of electrons that surround the nucleus is dependent on how many protons there are, and the arrangement of such electron governs the majority of an element's chemical properties.

An element's atomic number determines its chemical characteristics.The quantity of electrons in an atom determines bonding as well as various chemical properties.The atomic mass Z is equivalent to the amount pf electrons inside a neutral atom.

The quantity of protons present in the nucleus affects an element's chemical characteristics.The atomic number refers to this quantity of protons.The total number of neutrons and protons in the atom's nucleus determines the mass of a atom, or its atomic mass.

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141.67 g of NH₃ (ammonia) are produced  9.17 grams of hydrogen.

Ammonia is an inorganic compound. Which is made up of nitrogen and hydrogen with the formula NH₃. A stable binary hydride, and the simplest pnictogen hydride, ammonia is a colourless gas with a different pungent smell.

The balanced equation is as follows:

N₂ + 3H₂ ⇒ 2 NH₃

9.17 g N₂ x (1 mol/ 28.0g N₂) x (2 mol NH₃/ 1 mol N₂) × (51.54 g NH₃ / 1 molNH₃)

= 30.36 g

9.17 g H₂ x (1 mol H₂/ 2.00g H₂) × (2 mol NH₃/ 3 mol H₂) x (17.0g NH₃/ 1 mol NHL)

= 141.67 g

Thus, 141.67 g of NH₃ are produced  9.17 grams of hydrogen.

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The experimental percent  yield of  water in the hydrate is  61.67% and percent error is 38.33%.

Percent yield is defined as the ratio of actual yield to the theoretical yield multiplied by 100. If the actual and theoretical yield are same then the percent yield is 100%.If actual yield is less than the theoretical yield then the percent yield is less than 100%.Reason of this condition arising is the incompletion of reaction or loss of sample during recovery process.

In the given problem percent yield of  water in the hydrate is 22/35.67×100= 61.67%.Thus, percent error = 100-61.67= 38.33%.

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The best answer 1 and 2, the carbon skeletons of which two amino acids enter metabolism at the level of pyruvate are alanine and serine or alanine and cysteine.

Metabolism refers to the chemical processes that occur within an organism to maintain life. These processes include the breakdown of nutrients to release energy and the synthesis of molecules that the body needs for growth and repair. There are two main types of metabolism: catabolism, which involves the breakdown of molecules to release energy, and anabolism, which involves the synthesis of molecules using energy.

The rate at which an individual's metabolism operates can affect their weight, with a faster metabolism generally leading to a higher rate of calorie burn and a slower metabolism leading to a lower rate of calorie burn. However, factors such as genetics, age, and sex also play a role in determining an individual's metabolism. Additionally, lifestyle factors such as diet and physical activity can also impact metabolism, with regular exercise and a balanced diet known to help boost metabolism.

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