Question 1

Calculate the mass of one mole of fluoxetine, an antidepressant with the chemical formula C17H18F3NO.

Accepted Answer

A)  6.02 × 1023 g 
B)  309 g 
C)  162 g 
D)  48.0 g 
E)  40.0 g 
A)  6.02 × 1023 g 
B)  309 g 
C)  162 g 
D)  48.0 g 
E)  40.0 g B

Question 2

How many moles is 9.1 × 1024 ions of Na+?

Accepted Answer

A)  5.5 × 1048 mol 
B)  0.17 mol 
C)  1 mol 
D)  15 mol 
E)  0.67 mol 
A)  5.5 × 1048 mol 
B)  0.17 mol 
C)  1 mol 
D)  15 mol 
E)  0.67 mol D

Question 3

The balanced equation for the reaction of nitrogen and hydrogen to form ammonia is given below.What do the numbers in front of the molecules (the coefficients)mean? N2 + 3 H2 → 2 NH3

Accepted Answer

A)  Three moles of H2 react with one mole of N2 to give two moles of NH3. 
B)  Three grams of H2 react with one gram of N2 to give two grams of NH3. 
C)  Three atoms of H react with one atom of N to give two molecules of NH3. 
D)  Two grams of N react with six grams of H to give eight grams of NH3. 
E)  All of the above are correct representations. 
A)  Three moles of H2 react with one mole of N2 to give two moles of NH3. 
B)  Three grams of H2 react with one gram of N2 to give two grams of NH3. 
C)  Three atoms of H react with one atom of N to give two molecules of NH3. 
D)  Two grams of N react with six grams of H to give eight grams of NH3. 
E)  All of the above are correct representations. A

Question 4

What type of reaction occurs when hydrogen peroxide reacts to give water and oxygen? 2 H2O2 (l)→ 2 H2O (l)+ O2 (g)

Accepted Answer

A)  combination 
B)  decomposition 
C)  single replacement 
D)  double replacement 
E)  oxidation-reduction 
A)  combination 
B)  decomposition 
C)  single replacement 
D)  double replacement 
E)  oxidation-reduction

Question 5

Pentane (C5H12)reacts with oxygen gas (O2)to form carbon dioxide (CO2)and water (H2O)according to the following reaction.What is the coefficient for water in the balanced equation? C5H12 + ?O2 → ?CO2 + ?H2O

Accepted Answer

A)  2 
B)  4 
C)  5 
D)  6 
E)  8 
A)  2 
B)  4 
C)  5 
D)  6 
E)  8

Question 6

The industrial process for making ammonia from nitrogen and hydrogen gases is called the Haber process and is used in the manufacture of fertilizers and other nitrogen-containing compounds.The chemical equation for this process is shown below.According to this reaction, how many moles of ammonia would you produce if you reacted one mole of N2 with three moles of H2? N2 + 3 H2 → 2 NH3

Accepted Answer

A)  0 
B)  1 
C)  2 
D)  3 
E)  4 
A)  0 
B)  1 
C)  2 
D)  3 
E)  4

Question 7

How many moles of the antibiotic tetracycline (C22H24N2O8)are in a 50-mg dose?

Accepted Answer

A)  8880 mol 
B)  22.2 mol 
C)  8.88 mol 
D)  0.113 mol 
E)  1.13 × 10-4 mol 
A)  8880 mol 
B)  22.2 mol 
C)  8.88 mol 
D)  0.113 mol 
E)  1.13 × 10-4 mol

Question 8

What does it mean for mass to be conserved?

Accepted Answer

A)  Mass is neither created nor destroyed in the course of a chemical reaction. 
B)  Mass is a valuable resource and should not be wasted. 
C)  Molecules do not degrade under normal circumstances. 
D)  Atoms sometimes disappear over the course of a chemical reaction. 
E)  Atoms sometimes appear, disappear, or are changed over the course of a chemical reaction. 
A)  Mass is neither created nor destroyed in the course of a chemical reaction. 
B)  Mass is a valuable resource and should not be wasted. 
C)  Molecules do not degrade under normal circumstances. 
D)  Atoms sometimes disappear over the course of a chemical reaction. 
E)  Atoms sometimes appear, disappear, or are changed over the course of a chemical reaction.

Question 9

Pentane (C5H12)reacts with oxygen gas (O2)to form carbon dioxide (CO2)and water (H2O)according to the following reaction.What is the coefficient for carbon dioxide in the balanced equation? C5H12 + ?O2 → ?CO2 + ?H2O

Accepted Answer

A)  2 
B)  4 
C)  5 
D)  6 
E)  8 
A)  2 
B)  4 
C)  5 
D)  6 
E)  8

Question 10

Which of the following values is Avogadro's number?

Accepted Answer

A)  6 
B)  6.02 
C)  6.02 × 1023 
D)  6.02 × 1026 
E)  6.02 × 10123 
A)  6 
B)  6.02 
C)  6.02 × 1023 
D)  6.02 × 1026 
E)  6.02 × 10123

Question 11

What is the mass of one mole of the hydroxide ion (OH-)?

Accepted Answer

A)  8 g 
B)  15 g 
C)  17 g 
D)  7 g 
E)  5 g 
A)  8 g 
B)  15 g 
C)  17 g 
D)  7 g 
E)  5 g

Question 12

If Jane Doe has a blood glucose (C6H12O6)concentration of 0.102 g/dL, how many glucose molecules does she have in each deciliter of blood?

Accepted Answer

A)  3.41 × 1026 
B)  3.41 × 1023 
C)  3.41 × 1020 
D)  6.41 × 1022 
E)  5.67 × 10-4 
A)  3.41 × 1026 
B)  3.41 × 1023 
C)  3.41 × 1020 
D)  6.41 × 1022 
E)  5.67 × 10-4

Question 13

Which of the following chemical equations is balanced?

Accepted Answer

A)  C3H8 + O2 → CO2 + H2O 
B)  C3H8 + O2 → 3 CO2 + 4 H2O 
C)  C3H8 + 10 O2 → 3 CO2 + 4 H2O 
D)  C3H8 + 5 O2 → 3 CO2 + 4 H2O 
E)  None of these are balanced. 
A)  C3H8 + O2 → CO2 + H2O 
B)  C3H8 + O2 → 3 CO2 + 4 H2O 
C)  C3H8 + 10 O2 → 3 CO2 + 4 H2O 
D)  C3H8 + 5 O2 → 3 CO2 + 4 H2O 
E)  None of these are balanced.

Question 14

The reaction that occurs in a hydrogen fuel cell is shown below.According to the chemical reaction, the product(s)of the reaction is/are __________, which is one of the benefits of the fuel cell. 2 H2 (g)+ O2 (g)→ 2 H2O (g)

Accepted Answer

A)  carbon dioxide 
B)  a liquid 
C)  hydrogen and oxygen 
D)  hydrogen 
E)  water 
A)  carbon dioxide 
B)  a liquid 
C)  hydrogen and oxygen 
D)  hydrogen 
E)  water

Question 15

In an oxidation-reduction reaction, the species that loses electrons is _______.

Accepted Answer

A)  oxygen 
B)  oxidized 
C)  hydrogen 
D)  reduced 
E)  carbon 
A)  oxygen 
B)  oxidized 
C)  hydrogen 
D)  reduced 
E)  carbon

Question 16

An oxidation-reduction reaction is the transfer of ________.

Accepted Answer

A)  sodium ions 
B)  phosphate ions 
C)  protons 
D)  electrons 
E)  oxygen atoms 
A)  sodium ions 
B)  phosphate ions 
C)  protons 
D)  electrons 
E)  oxygen atoms

Question 17

Jane Doe has her cholesterol measured and the resulting lab report gives a value of 0.548 × 10-3 mol/dL.You know that the normal range of cholesterol (C27H46O)is 0.100-0.240 g/dL.Is Jane Doe's cholesterol within the normal range?

Accepted Answer

A)  No, it is above 0.240 g/dL. 
B)  No, it is below 0.100 g/dL. 
C)  Yes, it is between 0.100 g/dL and 0.240 g/dL. 
D)  Yes, it is above 0.240 g/dL. 
E)  Yes, it is below 0.100 g/dL. 
A)  No, it is above 0.240 g/dL. 
B)  No, it is below 0.100 g/dL. 
C)  Yes, it is between 0.100 g/dL and 0.240 g/dL. 
D)  Yes, it is above 0.240 g/dL. 
E)  Yes, it is below 0.100 g/dL.

Question 18

Your friend combines vinegar (which contains acetic acid, CH3COOH)and baking soda (NaHCO3)and ends up with a runny foam.Your friend is pretty sure that the reaction produces water and carbon dioxide because the reaction forms bubbles, but he is unsure of what else the reaction produces.Given the partial reaction below, what do you tell your friend? NaHCO3 + CH3COOH → H2O + CO2 + ?

Accepted Answer

A)  This reaction also produces sodium acetate (CH3COONa). 
B)  This reaction also produces methane (CH4). 
C)  This reaction also produces O2. 
D)  This reaction only produces H2O and CO2. 
E)  This reaction probably produces something else, but it is not possible to determine the identity of the other product(s). 
A)  This reaction also produces sodium acetate (CH3COONa). 
B)  This reaction also produces methane (CH4). 
C)  This reaction also produces O2. 
D)  This reaction only produces H2O and CO2. 
E)  This reaction probably produces something else, but it is not possible to determine the identity of the other product(s).

Question 19

How many atoms of hydrogen are present in the products of this chemical equation? Mg(OH)2 + 2 HCl → MgCl2 + 2 H2O

Accepted Answer

A)  0 
B)  1 
C)  2 
D)  3 
E)  4 
A)  0 
B)  1 
C)  2 
D)  3 
E)  4

Question 20

Hydrogen peroxide loses its potency when it is stored for extended periods of time because it spontaneously breaks down.The following figure illustrates this breakdown, but it is missing a product molecule.Which of the following symbols represents the missing product in this reaction?

Accepted Answer

A)    
B)    
C)    
D)    
E)    
A)    
B)    
C)    
D)    
E)

Calculate the mass of one mole of fluoxetine, an antidepressant with the chemical formula C₁₇H₁₈F₃NO.

How many moles is 9.1 × 10²⁴ ions of Na⁺?

The balanced equation for the reaction of nitrogen and hydrogen to form ammonia is given below.What do the numbers in front of the molecules (the coefficients)mean? N₂ + 3 H₂ → 2 NH₃

What type of reaction occurs when hydrogen peroxide reacts to give water and oxygen? 2 H₂O₂ (l)→ 2 H₂O (l)+ O₂ (g)

Pentane (C₅H₁₂)reacts with oxygen gas (O₂)to form carbon dioxide (CO₂)and water (H₂O)according to the following reaction.What is the coefficient for water in the balanced equation? C₅H₁₂ + ?O₂ → ?CO₂ + ?H₂O

How many moles of the antibiotic tetracycline (C₂₂H₂₄N₂O₈)are in a 50-mg dose?

What does it mean for mass to be conserved?

Pentane (C₅H₁₂)reacts with oxygen gas (O₂)to form carbon dioxide (CO₂)and water (H₂O)according to the following reaction.What is the coefficient for carbon dioxide in the balanced equation? C₅H₁₂ + ?O₂ → ?CO₂ + ?H₂O

Which of the following values is Avogadro's number?

What is the mass of one mole of the hydroxide ion (OH^-)?

If Jane Doe has a blood glucose (C₆H₁₂O₆)concentration of 0.102 g/dL, how many glucose molecules does she have in each deciliter of blood?

Which of the following chemical equations is balanced?

The reaction that occurs in a hydrogen fuel cell is shown below.According to the chemical reaction, the product(s)of the reaction is/are __________, which is one of the benefits of the fuel cell. 2 H₂ (g)+ O₂ (g)→ 2 H₂O (g)

In an oxidation-reduction reaction, the species that loses electrons is _______.

An oxidation-reduction reaction is the transfer of ________.

Jane Doe has her cholesterol measured and the resulting lab report gives a value of 0.548 × 10^-3 mol/dL.You know that the normal range of cholesterol (C₂₇H₄₆O)is 0.100-0.240 g/dL.Is Jane Doe's cholesterol within the normal range?

How many atoms of hydrogen are present in the products of this chemical equation? Mg(OH)₂ + 2 HCl → MgCl₂ + 2 H₂O

Hydrogen peroxide loses its potency when it is stored for extended periods of time because it spontaneously breaks down.The following figure illustrates this breakdown, but it is missing a product molecule.Which of the following symbols represents the missing product in this reaction?

Matter, Energy, and Measurement

Atomic Structure and Radioisotopes

Ionic and Covalent Compounds

Molecular Geometry, Polarity, and Intermolecular

Chemical Reactions: Energy, Rates, and Equilibrium

Changes of State and Gas Laws

Mixtures, Solution Concentrations, and Diffusion

Acids and Bases, Ph, and Buffers

Introduction to Organic Chemistry:

Alcohols, Phenols, Thiols, Ethers, and Amines

The Carbonyl Containing Functional Groups

The Common Organic Reactions in Biochemistry

Carbohydrates: Structure and Function

Lipids: Structure and Function

Proteins: Structure and Function

Nucleotides and Nucleic Acids

Energy and Metabolism

Filters

Exam 5: Chemical Quantities and Introduction to Reactions

Calculate the mass of one mole of fluoxetine, an antidepressant with the chemical formula C17H18F3NO.

How many moles is 9.1 × 1024 ions of Na+?

The balanced equation for the reaction of nitrogen and hydrogen to form ammonia is given below.What do the numbers in front of the molecules (the coefficients)mean? N2 + 3 H2 → 2 NH3

What type of reaction occurs when hydrogen peroxide reacts to give water and oxygen? 2 H2O2 (l)→ 2 H2O (l)+ O2 (g)

Pentane (C5H12)reacts with oxygen gas (O2)to form carbon dioxide (CO2)and water (H2O)according to the following reaction.What is the coefficient for water in the balanced equation? C5H12 + ?O2 → ?CO2 + ?H2O

How many moles of the antibiotic tetracycline (C22H24N2O8)are in a 50-mg dose?

What does it mean for mass to be conserved?

Pentane (C5H12)reacts with oxygen gas (O2)to form carbon dioxide (CO2)and water (H2O)according to the following reaction.What is the coefficient for carbon dioxide in the balanced equation? C5H12 + ?O2 → ?CO2 + ?H2O

Which of the following values is Avogadro's number?

What is the mass of one mole of the hydroxide ion (OH-)?

If Jane Doe has a blood glucose (C6H12O6)concentration of 0.102 g/dL, how many glucose molecules does she have in each deciliter of blood?

Which of the following chemical equations is balanced?

The reaction that occurs in a hydrogen fuel cell is shown below.According to the chemical reaction, the product(s)of the reaction is/are __________, which is one of the benefits of the fuel cell. 2 H2 (g)+ O2 (g)→ 2 H2O (g)

In an oxidation-reduction reaction, the species that loses electrons is _______.

An oxidation-reduction reaction is the transfer of ________.

Jane Doe has her cholesterol measured and the resulting lab report gives a value of 0.548 × 10-3 mol/dL.You know that the normal range of cholesterol (C27H46O)is 0.100-0.240 g/dL.Is Jane Doe's cholesterol within the normal range?

How many atoms of hydrogen are present in the products of this chemical equation? Mg(OH)2 + 2 HCl → MgCl2 + 2 H2O

Hydrogen peroxide loses its potency when it is stored for extended periods of time because it spontaneously breaks down.The following figure illustrates this breakdown, but it is missing a product molecule.Which of the following symbols represents the missing product in this reaction?

Matter, Energy, and Measurement

Atomic Structure and Radioisotopes

Ionic and Covalent Compounds

Molecular Geometry, Polarity, and Intermolecular

Chemical Reactions: Energy, Rates, and Equilibrium

Changes of State and Gas Laws

Mixtures, Solution Concentrations, and Diffusion

Acids and Bases, Ph, and Buffers

Introduction to Organic Chemistry:

Alcohols, Phenols, Thiols, Ethers, and Amines

The Carbonyl Containing Functional Groups

The Common Organic Reactions in Biochemistry

Carbohydrates: Structure and Function

Lipids: Structure and Function

Proteins: Structure and Function

Nucleotides and Nucleic Acids

Energy and Metabolism

Filters

Calculate the mass of one mole of fluoxetine, an antidepressant with the chemical formula C₁₇H₁₈F₃NO.

How many moles is 9.1 × 10²⁴ ions of Na⁺?

The balanced equation for the reaction of nitrogen and hydrogen to form ammonia is given below.What do the numbers in front of the molecules (the coefficients)mean? N₂ + 3 H₂ → 2 NH₃

What type of reaction occurs when hydrogen peroxide reacts to give water and oxygen? 2 H₂O₂ (l)→ 2 H₂O (l)+ O₂ (g)

Pentane (C₅H₁₂)reacts with oxygen gas (O₂)to form carbon dioxide (CO₂)and water (H₂O)according to the following reaction.What is the coefficient for water in the balanced equation? C₅H₁₂ + ?O₂ → ?CO₂ + ?H₂O

How many moles of the antibiotic tetracycline (C₂₂H₂₄N₂O₈)are in a 50-mg dose?

Pentane (C₅H₁₂)reacts with oxygen gas (O₂)to form carbon dioxide (CO₂)and water (H₂O)according to the following reaction.What is the coefficient for carbon dioxide in the balanced equation? C₅H₁₂ + ?O₂ → ?CO₂ + ?H₂O

What is the mass of one mole of the hydroxide ion (OH^-)?

If Jane Doe has a blood glucose (C₆H₁₂O₆)concentration of 0.102 g/dL, how many glucose molecules does she have in each deciliter of blood?

The reaction that occurs in a hydrogen fuel cell is shown below.According to the chemical reaction, the product(s)of the reaction is/are __________, which is one of the benefits of the fuel cell. 2 H₂ (g)+ O₂ (g)→ 2 H₂O (g)

Jane Doe has her cholesterol measured and the resulting lab report gives a value of 0.548 × 10^-3 mol/dL.You know that the normal range of cholesterol (C₂₇H₄₆O)is 0.100-0.240 g/dL.Is Jane Doe's cholesterol within the normal range?

How many atoms of hydrogen are present in the products of this chemical equation? Mg(OH)₂ + 2 HCl → MgCl₂ + 2 H₂O