Question 1

Calculate the mass of one mole of dopamine, a neurotransmitter with the molecular formula C8H11NO2.

Accepted Answer

A)  22.0 g 
B)  43.0 g 
C)  82.0 g 
D)  153 g 
E)  164 g 
A)  22.0 g 
B)  43.0 g 
C)  82.0 g 
D)  153 g 
E)  164 g

Question 2

A solution of glucose has 10.00 g glucose (molecular weight = 180.g/mol)in 1.00 L of water.How many molecules of glucose are in 1.00 L of the solution?

Accepted Answer

A)  0.05 molecules 
B)  180 molecules 
C)  3.34 ×1022 molecules 
D)  6.02 × 1023 molecules 
E)  6.02 × 1024 molecules 
A)  0.05 molecules 
B)  180 molecules 
C)  3.34 ×1022 molecules 
D)  6.02 × 1023 molecules 
E)  6.02 × 1024 molecules

Question 3

When two aqueous solutions of barium chloride (BaCl2)and copper sulfate (CuSO4)are combined, insoluble barium sulfate (BaSO4)forms leaving copper chloride (CuCl2)in solution.What type of reaction is this?

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 4

How many molecules of glucose are in 1 mole of glucose?

Accepted Answer

A)  3 
B)  24 
C)  29 
D)  180 
E)  6.02 × 1023 
A)  3 
B)  24 
C)  29 
D)  180 
E)  6.02 × 1023

Question 5

How many atoms of magnesium are present in the reactants 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 6

How many grams of iron are in 1.28 mol of iron?

Accepted Answer

A)  0.0230 g 
B)  20.3 g 
C)  33.3 g 
D)  43.6 g 
E)  71.4 g 
A)  0.0230 g 
B)  20.3 g 
C)  33.3 g 
D)  43.6 g 
E)  71.4 g

Question 7

Jane Doe has a cholesterol (C27H46O)count of 178 mg/dL.How many cholesterol molecules does Jane Doe have in each deciliter of blood?

Accepted Answer

A)  7.64 × 10-22 
B)  1.14 × 10-22 
C)  2.77 × 1020 
D)  5.54 × 1025 
E)  2.77 × 1026 
A)  7.64 × 10-22 
B)  1.14 × 10-22 
C)  2.77 × 1020 
D)  5.54 × 1025 
E)  2.77 × 1026

Question 8

Which statement describes how formula mass and molecular mass differ?

Accepted Answer

A)  A formula mass is measured in atomic mass units, whereas a molecular mass is measured in grams per mole. 
B)  A formula mass is measured in grams per mole, whereas a molecular mass is measured in atomic mass units. 
C)  A formula mass is the mass of one formula unit, whereas molecular mass is the mass of one molecule. 
D)  A formula mass is the mass of one molecule, whereas molecular mass is the mass of one formula unit. 
E)  There is no difference between these terms. 
A)  A formula mass is measured in atomic mass units, whereas a molecular mass is measured in grams per mole. 
B)  A formula mass is measured in grams per mole, whereas a molecular mass is measured in atomic mass units. 
C)  A formula mass is the mass of one formula unit, whereas molecular mass is the mass of one molecule. 
D)  A formula mass is the mass of one molecule, whereas molecular mass is the mass of one formula unit. 
E)  There is no difference between these terms.

Question 9

The balanced chemical equation for the combustion of butane is given below and is the reaction happening when you use a butane lighter.How many grams of O2 are needed to completely react with 5.0 g of butane? 2 C4H10 + 13 O2 → 8 CO2 + 10 H2O

Accepted Answer

A)  0.42 g 
B)  2.8 g 
C)  6.0 g 
D)  9.1 g 
E)  18 g 
A)  0.42 g 
B)  2.8 g 
C)  6.0 g 
D)  9.1 g 
E)  18 g

Question 10

Coefficients are important components of chemical equations.What is the significance of coefficients in a chemical equation? I.Coefficients indicate the ratio of masses of molecules.
II)Coefficients indicate the ratio of numbers of atoms and molecules.
III)Coefficients indicate the ratio of numbers of moles of molecules and atoms.

Accepted Answer

A)  I only 
B)  II only 
C)  III only 
D)  I and II 
E)  II and III 
A)  I only 
B)  II only 
C)  III only 
D)  I and II 
E)  II and III

Question 11

How is a nuclear reaction different from a chemical reaction?

Accepted Answer

A)  They are identical. 
B)  Only in a chemical reaction can atoms change into different atoms. 
C)  Chemical reactions involve only the nucleus of the atom. 
D)  Only in a nuclear reaction can atoms change into different atoms. 
E)  Nuclear reactions release energy and chemical reactions absorb energy. 
A)  They are identical. 
B)  Only in a chemical reaction can atoms change into different atoms. 
C)  Chemical reactions involve only the nucleus of the atom. 
D)  Only in a nuclear reaction can atoms change into different atoms. 
E)  Nuclear reactions release energy and chemical reactions absorb energy.

Question 12

Which statement BEST describes the following reaction? Fe + Cu2+ → Fe2+ + Cu

Accepted Answer

A)  In this reaction, both iron and copper are reduced. 
B)  In this reaction, both iron and copper are oxidized. 
C)  In this reaction, iron is reduced, and copper is oxidized. 
D)  In this reaction, iron is oxidized, and copper is reduced. 
E)  This is not an oxidation-reduction reaction. 
A)  In this reaction, both iron and copper are reduced. 
B)  In this reaction, both iron and copper are oxidized. 
C)  In this reaction, iron is reduced, and copper is oxidized. 
D)  In this reaction, iron is oxidized, and copper is reduced. 
E)  This is not an oxidation-reduction reaction.

Question 13

Acetylene (C2H2)is a small organic molecule used in the industrial preparation of many other molecules and also in welding.Acetylene is made from calcium carbide (CaC2)and water and produces acetylene and calcium hydroxide.Which of the following choices is the correct balanced chemical equation for the preparation of acetylene?

Accepted Answer

A)  CaC2 + H2O → CaO + C2H2 
B)  CaC2 + H2O → Ca(OH)2 + C2H2 
C)  CaC2 + 2 H2O → Ca(OH)2 + C2H2 
D)  CaC2 + 2 H2O → CaO + C2H2 + H2O 
E)  2 CaC2 + H2O → Ca(OH)2 + 2 C2H2 
A)  CaC2 + H2O → CaO + C2H2 
B)  CaC2 + H2O → Ca(OH)2 + C2H2 
C)  CaC2 + 2 H2O → Ca(OH)2 + C2H2 
D)  CaC2 + 2 H2O → CaO + C2H2 + H2O 
E)  2 CaC2 + H2O → Ca(OH)2 + 2 C2H2

Question 14

Which of the following transformations is a chemical reaction?

Accepted Answer

A)  water boiling 
B)  burning wood 
C)  condensation on the outside of a water glass 
D)  dry ice changing from a solid to a gas 
E)  evaporation of water from a glass 
A)  water boiling 
B)  burning wood 
C)  condensation on the outside of a water glass 
D)  dry ice changing from a solid to a gas 
E)  evaporation of water from a glass

Question 15

What is the balanced chemical equation for the reaction illustrated in Figure I? ​

Accepted Answer

A)  CH4 + 2 O2 → 2 H2O + CO2 
B)  CH4 + O2 → H2O + CO2 
C)  2 CH4 + 4 O2 → 4 H2O + 2 CO2 
D)  2 C + 8 H + 8 O → 2 C + 8 H + 8 O 
E)  C + 4 H + 4 O → C + 4 H + 4 O 
A)  CH4 + 2 O2 → 2 H2O + CO2 
B)  CH4 + O2 → H2O + CO2 
C)  2 CH4 + 4 O2 → 4 H2O + 2 CO2 
D)  2 C + 8 H + 8 O → 2 C + 8 H + 8 O 
E)  C + 4 H + 4 O → C + 4 H + 4 O

Question 16

Which of these figures illustrate chemical reactions? ​

Accepted Answer

A)  All of these are chemical reactions. 
B)  Only I and II are chemical reactions. 
C)  Only I and III are chemical reactions. 
D)  Only II and III are chemical reactions. 
E)  None of these figures represent chemical reactions. 
A)  All of these are chemical reactions. 
B)  Only I and II are chemical reactions. 
C)  Only I and III are chemical reactions. 
D)  Only II and III are chemical reactions. 
E)  None of these figures represent chemical reactions.

Question 17

The following reaction is an example of a(n)___________ reaction. CH4 + 2 O2 → CO2 + 2 H2O
I.oxidation-reduction
II.combination
III.combustion

Accepted Answer

A)  I only 
B)  I and II only 
C)  III only 
D)  I and III only 
E)  I, II, and III 
A)  I only 
B)  I and II only 
C)  III only 
D)  I and III only 
E)  I, II, and III

Question 18

The ionic compound CaCO3 has a formula mass of:

Accepted Answer

A)  50 g/mol. 
B)  50 amu. 
C)  100 g/mol. 
D)  100 amu. 
E)  68.1 amu. 
A)  50 g/mol. 
B)  50 amu. 
C)  100 g/mol. 
D)  100 amu. 
E)  68.1 amu.

Question 19

How many copper atoms are in 0.5 mol of copper?

Accepted Answer

A)  6.02 × 1012 
B)  0.5 
C)  3.01 × 1023 
D)  32 
E)  3 
A)  6.02 × 1012 
B)  0.5 
C)  3.01 × 1023 
D)  32 
E)  3

Question 20

Which of the following is NOT an example of a double displacement reaction?

Accepted Answer

A)  BaSO4 + CuCl2 → BaCl2 + CuSO4 
B)  2 KI (aq) + Pb(NO3)2 (aq) → 2 KNO3 (aq) + PbI2 (s) 
C)    
D)  CH4 + 2O2 → CO2 + 2H2O 
E)  NaOH + HCl → H2O + NaCl 
A)  BaSO4 + CuCl2 → BaCl2 + CuSO4 
B)  2 KI (aq) + Pb(NO3)2 (aq) → 2 KNO3 (aq) + PbI2 (s) 
C)    
D)  CH4 + 2O2 → CO2 + 2H2O 
E)  NaOH + HCl → H2O + NaCl

Calculate the mass of one mole of dopamine, a neurotransmitter with the molecular formula C₈H₁₁NO₂.

A solution of glucose has 10.00 g glucose (molecular weight = 180.g/mol)in 1.00 L of water.How many molecules of glucose are in 1.00 L of the solution?

When two aqueous solutions of barium chloride (BaCl₂)and copper sulfate (CuSO₄)are combined, insoluble barium sulfate (BaSO₄)forms leaving copper chloride (CuCl₂)in solution.What type of reaction is this?

How many molecules of glucose are in 1 mole of glucose?

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

How many grams of iron are in 1.28 mol of iron?

Jane Doe has a cholesterol (C₂₇H₄₆O)count of 178 mg/dL.How many cholesterol molecules does Jane Doe have in each deciliter of blood?

Which statement describes how formula mass and molecular mass differ?

The balanced chemical equation for the combustion of butane is given below and is the reaction happening when you use a butane lighter.How many grams of O₂ are needed to completely react with 5.0 g of butane? 2 C₄H₁₀ + 13 O₂ → 8 CO₂ + 10 H₂O

How is a nuclear reaction different from a chemical reaction?

Which statement BEST describes the following reaction? Fe + Cu²⁺ → Fe²⁺ + Cu

Which of the following transformations is a chemical reaction?

What is the balanced chemical equation for the reaction illustrated in Figure I?

Which of these figures illustrate chemical reactions?

The following reaction is an example of a(n)___________ reaction. CH₄ + 2 O₂ → CO₂ + 2 H₂O I.oxidation-reduction II.combination III.combustion

The ionic compound CaCO₃ has a formula mass of:

How many copper atoms are in 0.5 mol of copper?

Which of the following is NOT an example of a double displacement 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

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Exam 5: Chemical Quantities and Introduction to Reactions

Calculate the mass of one mole of dopamine, a neurotransmitter with the molecular formula C8H11NO2.

A solution of glucose has 10.00 g glucose (molecular weight = 180.g/mol)in 1.00 L of water.How many molecules of glucose are in 1.00 L of the solution?

When two aqueous solutions of barium chloride (BaCl2)and copper sulfate (CuSO4)are combined, insoluble barium sulfate (BaSO4)forms leaving copper chloride (CuCl2)in solution.What type of reaction is this?

How many molecules of glucose are in 1 mole of glucose?

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

How many grams of iron are in 1.28 mol of iron?

Jane Doe has a cholesterol (C27H46O)count of 178 mg/dL.How many cholesterol molecules does Jane Doe have in each deciliter of blood?

Which statement describes how formula mass and molecular mass differ?

The balanced chemical equation for the combustion of butane is given below and is the reaction happening when you use a butane lighter.How many grams of O2 are needed to completely react with 5.0 g of butane? 2 C4H10 + 13 O2 → 8 CO2 + 10 H2O

How is a nuclear reaction different from a chemical reaction?

Which statement BEST describes the following reaction? Fe + Cu2+ → Fe2+ + Cu

Which of the following transformations is a chemical reaction?

What is the balanced chemical equation for the reaction illustrated in Figure I? ​

Which of these figures illustrate chemical reactions? ​

The following reaction is an example of a(n)___________ reaction. CH4 + 2 O2 → CO2 + 2 H2O I.oxidation-reduction II.combination III.combustion

The ionic compound CaCO3 has a formula mass of:

How many copper atoms are in 0.5 mol of copper?

Which of the following is NOT an example of a double displacement 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 dopamine, a neurotransmitter with the molecular formula C₈H₁₁NO₂.

When two aqueous solutions of barium chloride (BaCl₂)and copper sulfate (CuSO₄)are combined, insoluble barium sulfate (BaSO₄)forms leaving copper chloride (CuCl₂)in solution.What type of reaction is this?

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

Jane Doe has a cholesterol (C₂₇H₄₆O)count of 178 mg/dL.How many cholesterol molecules does Jane Doe have in each deciliter of blood?

The balanced chemical equation for the combustion of butane is given below and is the reaction happening when you use a butane lighter.How many grams of O₂ are needed to completely react with 5.0 g of butane? 2 C₄H₁₀ + 13 O₂ → 8 CO₂ + 10 H₂O

Which statement BEST describes the following reaction? Fe + Cu²⁺ → Fe²⁺ + Cu

What is the balanced chemical equation for the reaction illustrated in Figure I?

Which of these figures illustrate chemical reactions?

The following reaction is an example of a(n)___________ reaction. CH₄ + 2 O₂ → CO₂ + 2 H₂O I.oxidation-reduction II.combination III.combustion

The ionic compound CaCO₃ has a formula mass of: