What conversion factor is used to convert from moles of substance A to moles of substance B?
A.) molar mass; go to #7
B.) Avogadro's number; go to #1
C.) mole ratio; go to #6
D.) the mass of 1 mole; go to #4

Please help!! Been struggling

Answers

Answer 1

Mole ratio is the conversion factor used to convert from moles of substance A to moles of substance B (option C).

What is mole ratio?

Mole ratio is a ratio of the number of moles of one substance to the number of moles of another substance in a balanced chemical equation.

It allows us to convert between moles of different substances involved in a chemical reaction. Molar mass (A), Avogadro's number (B), and the mass of 1 mole (D) can be used to convert between moles and other units, such as mass and number of particles.

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Related Questions

after the reaction reaches equilibrium at 690 k, the total pressure in the flask is 1.2 atm. what is the value of kp for the reaction at 690 k?

Answers

The value of Kp for the reaction at 690 K is 2.51 x 10-3.

At equilibrium, the total pressure in the flask is equal to the sum of the partial pressures of the reactants and products. Since the total pressure is given as 1.2 atm, the value of Kp can be calculated as follows:

Kp = (PH2*PI2)/PHI = (1.2 atm)/(PHI)

Where PH2, PI2 and PHI are the partial pressures of hydrogen gas, iodine gas and hydrogen iodide gas, respectively.

At equilibrium, the rate of forward reaction is equal to the rate of the reverse reaction. Hence, the value of Kp for the reaction at 690 K is equal to the equilibrium constant of the reaction at 690 K.

Kp = (2.51 x 10-3)690 K

Hence, the value of Kp for the reaction at 690 K is 2.51 x 10-3.

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what is the relationship between the unit cell length a and the atomic radius r for the body centered cubic

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The relationship between the unit cell length a and the atomic radius r for the body centered cubic can be expressed by the formula:
a = 4r/√3

A unit cell is a cube of atoms, and in the body centered cubic structure, the unit cell contains 8 corner atoms and 1 central atom.

The 8 corner atoms each occupy a space of one-eighth of the total unit cell volume, whereas the central atom occupies one-half of the total unit cell volume. Thus, the total volume of a unit cell can be expressed as: V = a3.

The atomic radius, r, is the distance between the center of an atom and its outermost electron shells. Thus, the atomic radius of the central atom will be half of the length of the unit cell, a.

This can be expressed mathematically as: r = a/2.

By combining the two equations, a = 4r/√3, we can get the formula for the relationship between the unit cell length a and the atomic radius r for the body centered cubic: a = 4r/√3.

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What do these two changes have in common?
boiling sugar to make caramel
using a large magnet to remove pieces of iron from a junkyard

Answers

Boiling sugar to make caramel and using a large magnet to remove pieces of iron from a junkyard are two very different processes, but they have one thing in common: they both involve a physical change.

A physical change is a change in a substance that does not result in the formation of a new substance with different chemical properties. In other words, the substance does not undergo a chemical reaction, but rather a change in its physical properties.

Boiling sugar to make caramel is a physical change because the sugar undergoes a change in its physical properties, such as color, texture, and taste, without undergoing a chemical reaction. The sugar molecules are heated to the point where they break down and re-form into a new substance with new properties, but the chemical composition of the sugar remains the same.

Using a large magnet to remove pieces of iron from a junkyard is also a physical change because the magnet is not altering the chemical properties of the iron, but only its physical location. The magnet is attracting and removing the iron from the junkyard, but the iron itself is not undergoing a chemical reaction.

In both cases, the substances are undergoing a physical change, but their chemical properties remain unchanged.

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This is done by the (8) _____, where it is assumed the topmost layer is the youngest and the bottom-most layer is the oldest

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This is done by the process of stratigraphy, where it is assumed that the topmost layer is the youngest and the bottom-most layer is the oldest.

Stratigraphy is a branch of geology that deals with the study of rock layers (strata) and their relative positions in order to determine the geologic history and the sequence of events that led to their formation. By analyzing the characteristics of the strata, such as their composition, texture, and fossil content, scientists can make inferences about past environmental conditions and the evolution of life on Earth. Stratigraphy is an important tool for geologists and paleontologists to understand the geologic history of a region and the relationships between different rock formations.

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you run a column in a less polar solvent and then rerun the same column in a more polar solvent, what will happen to the spots in the column?

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When you run a column in a less polar solvent and then rerun the same column in a more polar solvent, the spots in the column will move with different distances.

During this process, some of the spots will move with longer distances while others will move with shorter distances.

The spots that move with longer distances will be considered more polar and the spots that move with shorter distances will be considered less polar.

There are several factors that influence the movement of the spots in a column chromatography. The polarity of the solvent is one of the most important factors.

A polar solvent will attract polar compounds, while a nonpolar solvent will attract nonpolar compounds.

The spots in a column chromatography will move with different distances depending on the polarity of the solvent used.

In a less polar solvent, the spots will move with shorter distances because the solvent is not able to dissolve the more polar compounds as efficiently.

a more polar solvent, the spots will move with longer distances because the solvent is able to dissolve the more polar compounds more efficiently.

This is because a more polar solvent has a higher affinity for the polar compounds than a less polar solvent.Overall, the movement of the spots in a column chromatography is determined by the polarity of the solvent used.

When you run a column in a less polar solvent and then rerun the same column in a more polar solvent, the spots in the column will move with different distances.

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based on what you know about the process of pcr, what reagents must have been included in the pcr bead you used in the experiment? explain.

Answers

In order to conduct PCR (polymerase chain reaction), the reagents included in the PCR bead should be template DNA, primers, DNA polymerase, dNTPs (deoxynucleotide triphosphates), and a buffer.

1. Template DNA is the target DNA that is to be amplified during the PCR process.

2. Primers are short pieces of single-stranded DNA that are complementary to the ends of the target DNA sequence.

3. DNA polymerase is an enzyme used to replicate the target DNA sequence.

4. dNTPs are the building blocks of DNA which include adenine, thymine, cytosine, and guanine.

5. Lastly, the buffer helps maintain the appropriate pH for the reaction to occur.

In conclusion, the PCR bead used in the experiment must have contained a template DNA, primers, DNA polymerase, dNTPs, and a buffer in order for PCR to take place.

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a compound has an empirical formula of c3h6o and a molar mass of 116 g/mol. what is the molecular formula?

Answers

Answer:

Step by step explanation:

To determine the molecular formula of the compound, we need to find its molecular weight or molar mass. We can start by calculating the empirical formula's molar mass:

Empirical molar mass = (3C x Atomic mass of C) + (6H x Atomic mass of H) + (1O x Atomic mass of O)
Empirical molar mass = (3 x 12.01 g/mol) + (6 x 1.01 g/mol) + (1 x 16.00 g/mol) = 58.11 g/mol

We can then calculate the compound's molecular formula by dividing its molar mass by the empirical molar mass and multiplying the empirical formula's subscripts by the result:

Molecular formula = (Empirical formula) x (Molar mass of compound / Empirical molar mass)

Molecular formula = C3H6O x (116 g/mol / 58.11 g/mol) = C6H12O2

Therefore, the molecular formula of the compound is C6H12O2.

methane gas and oxygen gas react to form water vapor and carbon dioxide gas. what volume of carbon dioxide would be produced by this reaction if of methane were consumed?

Answers

The volume of carbon dioxide that would be produced by this reaction if methane were consumed is: [tex]CH4 + 2O2 → CO2 + 2H2O[/tex]

When methane gas and oxygen gas react, they produce water vapor and carbon dioxide gas. The volume of carbon dioxide produced by this reaction depends on the amount of methane gas that is consumed.

If 100 mL of methane gas were consumed, then the volume of carbon dioxide produced would be 44 mL. This reaction can be expressed in the following equation:
[tex]CH4 + 2O2 → CO2 + 2H2O[/tex]

The mole ratio of methane gas to carbon dioxide gas produced by this reaction is 1:1. This means that if 100 mL of methane gas is consumed, then 44 mL of carbon dioxide gas will be produced. This is because 44 mL of carbon dioxide is equivalent to 1 mole of carbon dioxide gas, and 100 mL of methane gas is equivalent to 1 mole of methane gas.

Therefore, if 100 mL of methane gas is consumed in this reaction, then 44 mL of carbon dioxide gas will be produced. This can be determined by using the mole ratio of methane gas to carbon dioxide gas, which is 1:1.

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what are the trials of Newton's first law of motion? Please help!!

Answers

Answer:

the law of inertia

Explanation:

Answer:

Newton's first law of motion states that an object at rest will remain at rest, and an object in motion will remain in motion with a constant velocity, unless acted upon by an external force. The trials of Newton's first law of motion are:

Inertia: The tendency of an object to resist changes in its motion, which is a direct consequence of Newton's first law. For example, a book resting on a table will remain at rest unless acted upon by an external force such as someone picking it up or the table collapsing.

Acceleration: If an external force acts on an object, it will accelerate. For example, a ball sitting on a flat surface will not move unless a force is applied, such as someone pushing it. Once the force is applied, the ball will accelerate in the direction of the force.

Equilibrium: When the net force acting on an object is zero, it is said to be in equilibrium. For example, a person standing still on the ground is in equilibrium because the gravitational force pulling them down is balanced by the force of the ground pushing up on them.

Friction: Friction is a force that opposes motion between two surfaces that are in contact with each other. This force is another example of an external force that can affect an object's motion, and is related to Newton's first law because it can cause an object to come to rest if the force of friction is greater than the force applied to the object.

citric acid contains 37.51% c, 4.20% h, and 58.29% o by mass. what is the empirical formula of this compound?

Answers

The empirical formula of the given compound can be determined as follows the CHOS or C3H4O3.

According to the given data, the compound citric acid contains 37.51% C, 4.20% H, and 58.29% O by mass. So, let's assume that we have 100 g of citric acid, and then, we can find the masses of each element present in it: Mass of carbon = 37.51 gMass of hydrogen = 4.20 g. Mass of oxygen = 58.29 g.

Next, we need to convert the masses into the number of moles using the molar masses of the elements. The molar mass of carbon = 12.01 g/mol, Number of moles of carbon = 37.51 g / 12.01 g/mol = 3.124 molMolar mass of hydrogen = 1.01 g/molNumber of moles of hydrogen = 4.20 g / 1.01 g/mol = 4.158 molMolar mass of oxygen = 16.00 g/molNumber of moles of oxygen = 58.29 g / 16.00 g/mol = 3.643 follow, we need to find the simplest whole-number ratio of these moles by dividing them by the smallest number of moles, which is 3.124 mol: Carbon = 3.124 mol / 3.124 mol = 1Hydrogen = 4.158 mol / 3.124 mol = 1.33 ≈ 1Oxygen = 3.643 mol / 3.124 mol = 1.17 ≈ 1So, the empirical formula of citric acid is CHOS or C3H4O3.

Answers

To prepare a buffer with a pH of 4.00, you need to mix acetic acid (CH3COOH) and its conjugate base acetate (CH3COO-). The ratio of acetic acid to acetate is determined by the Ka (the acid dissociation constant) of acetic acid, which is 1.8 x 10-5.

The formula for calculating the ratio of acetic acid to acetate is: [CH3COOH]/[CH3COO-] = Ka/pH. For the pH of 4.00, the ratio is: [CH3COOH]/[CH3COO-] = 1.8 x 10-5/4.00.

The Henderson-Hasselbalch equation can be used to calculate the ratio of conjugate acid and base needed to prepare a buffer. It is as follows: pH = pKa + log([A-]/[HA]), where [A-] is the concentration of the conjugate base, [HA] is the concentration of the acid, and pKa is the acid dissociation constant (Ka) expressed in logarithmic form. The ratio of [A-]/[HA] can be calculated by rearranging this equation as follows:[A-]/[HA] = 10^(pH - pKa)So, to prepare a buffer with a pH of 5.5 using CH3COOH (acetic acid), which has a Ka of 1.8 x 10^-5, the ratio of [CH3COO-] to [CH3COOH] should be:[CH3COO-]/[CH3COOH] = 10^(5.5 - 4.74) = 3.55.

Therefore, the ratio of [CH3COO-] to [CH3COOH] in the buffer should be 3.55.

Answers

The highest energy of activation in the SN1 mechanism for the substitution reaction of (CH3)3COH with HX is nucleophilic capture of the carbocation.

During this step, a nucleophile (such as HX) attacks the positive charge on the carbocation, forming a new bond and breaking an existing bond.

This transition state has a higher energy of activation than the other steps in the reaction because it requires the greatest reorganization of the electron density.

Protonation of the alcohol has the second highest energy of activation. This step involves the nucleophile donating a proton to the alcohol, forming an oxonium ion.

This step requires an intermediate and is energetically favorable because the oxygen lone pair donates electron density to the carbon, stabilizing the charge.

Finally, the loss of H2O to form the intermediate carbocation is the lowest energy of activation. This step involves breaking the bond between the oxygen and the hydrogen, releasing water in the process.

This is energetically favorable because the carbocation is more stable than the alcohol.

In conclusion, the highest energy of activation in the SN1 mechanism for the substitution reaction of (CH3)3COH with HX is nucleophilic capture of the carbocation.

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which is the best colored indicator to use in the titration of 0.1 m ch3cooh(aq) with naoh(aq)? why? look up ka values in the appendix. indicator pka bromocresol green 4.8 bromothymol blue 6.8 phenolphthalein 9.2 group of answer choices