Question 1

Which of the following is oxidation?

Accepted Answer

A)  loss of electrons 
B)  loss of hydrogen 
C)  gain of oxygen 
D)  all of these 
A)  loss of electrons 
B)  loss of hydrogen 
C)  gain of oxygen 
D)  all of these

Question 2

How much does a sample of 5.75 mol diethyl ether, C4H10O, weigh?

Accepted Answer

A)  5.75 g 
B)  12.9 g 
C)  74.1 
D)  426 
A)  5.75 g 
B)  12.9 g 
C)  74.1 
D)  426

Question 3

Which of the following is analogous to the reactants in a chemical reaction?

Accepted Answer

A)  a baked cake 
B)  the flour, eggs, and chocolate used to bake a cake 
C)  a baked cake and the flour, eggs, and chocolate used to bake a cake 
D)  neither a baked cake or the flour, eggs, and chocolate used to bake a cake 
A)  a baked cake 
B)  the flour, eggs, and chocolate used to bake a cake 
C)  a baked cake and the flour, eggs, and chocolate used to bake a cake 
D)  neither a baked cake or the flour, eggs, and chocolate used to bake a cake

Question 4

What is the molar mass of glucose, C6H12O6?

Accepted Answer

A)  60.05 amu 
B)  180.2 amu 
C)  60.05 g 
D)  180.2 g 
A)  60.05 amu 
B)  180.2 amu 
C)  60.05 g 
D)  180.2 g

Question 5

A certain protein has a molar mass of 2.38 × 105 g. What is the mass of one molecule of this protein?

Accepted Answer

A)  3.95 × 10-19 g 
B)  4.20 × 10-6 g 
C)  2.38 × 105 g 
D)  2.53 × 1018 g 
A)  3.95 × 10-19 g 
B)  4.20 × 10-6 g 
C)  2.38 × 105 g 
D)  2.53 × 1018 g

Question 6

Consider the following representation of a voltaic cell.   This voltaic cell is represented by the following reaction: Mg(s) + Cu2+(aq) → Cu(s) + Mg2+(aq)
​
Which of the following is true of the Mg(s) shown in the reaction representing the voltaic cell?

Accepted Answer

A)  It is the anode of the cell. 
B)  It is the place where reduction occurs. 
C)  It functions as the oxidizing agent. 
D)  All of these are correct. 
A)  It is the anode of the cell. 
B)  It is the place where reduction occurs. 
C)  It functions as the oxidizing agent. 
D)  All of these are correct.

Question 7

How many moles of marble, CaCO3, are there in a 275-g piece of marble?

Accepted Answer

A)  4.57 × 10-22 
B)  0.364 
C)  2.75 
D)  275 
A)  4.57 × 10-22 
B)  0.364 
C)  2.75 
D)  275

Question 8

The metabolism of one mole of glucose, C6H12O6, releases 6.70 × 102 kcal of heat. How much heat is released by the combustion of 50.0 g of glucose?

Accepted Answer

A)  186 kcal 
B)  201 kcal 
C)  2.23 × 103 kcal 
D)  2.41 × 103 kcal 
A)  186 kcal 
B)  201 kcal 
C)  2.23 × 103 kcal 
D)  2.41 × 103 kcal

Question 9

A substance weighing 1 kg is initially at 25°C. Heat of 11,000 cal of is added to it. What is the final temperature of the substance? The specific heat of the substance is 0.20 cal/g·°C.

Accepted Answer

A)  60°C 
B)  80°C 
C)  100°C 
D)  120°C 
A)  60°C 
B)  80°C 
C)  100°C 
D)  120°C

Question 10

The products of the reaction of phosphoric acid, H3PO4(aq), and solid magnesium hydroxide, Mg(OH)2(s), are aqueous magnesium phosphate and water. What is the balanced equation for this reaction?

Accepted Answer

A)  H3PO4(aq) + Mg(OH)2(s) → MgPO4(aq) + H2O(l) 
B)  2H3PO4(aq) + Mg(OH)2(s) → Mg(PO4)2(aq) + 2H2O(l) 
C)  3H3PO4(aq) + 2Mg(OH)2(s) → Mg2(PO4)3(aq) + 2H2O(l) 
D)  2H3PO4(aq) + 3Mg(OH)2(s) → Mg3(PO4)2(aq) + 6H2O(l) 
A)  H3PO4(aq) + Mg(OH)2(s) → MgPO4(aq) + H2O(l) 
B)  2H3PO4(aq) + Mg(OH)2(s) → Mg(PO4)2(aq) + 2H2O(l) 
C)  3H3PO4(aq) + 2Mg(OH)2(s) → Mg2(PO4)3(aq) + 2H2O(l) 
D)  2H3PO4(aq) + 3Mg(OH)2(s) → Mg3(PO4)2(aq) + 6H2O(l)

Question 11

The combustion of one mole of propane, C3H8, releases 531 kcal of heat. How much heat is released by the combustion of 4.40 g of propane?

Accepted Answer

A)  53.1 kcal 
B)  531 kcal 
C)  5.31 × 103 kcal 
D)  5.31 × 104 kcal 
A)  53.1 kcal 
B)  531 kcal 
C)  5.31 × 103 kcal 
D)  5.31 × 104 kcal

Question 12

Lime, CaO, is produced by the reaction CaCO3(s) → CaO(s) + CO2(g). What weight of CO2 is obtained by the decomposition of 38.7 g of CaCO3?

Accepted Answer

A)  15.5 g 
B)  17.0 g 
C)  21.7 g 
D)  23.2 g 
A)  15.5 g 
B)  17.0 g 
C)  21.7 g 
D)  23.2 g

Question 13

A typical deposit of cholesterol, C27H46O, in an artery has a mass of 3.90 mg. How many molecules of cholesterol are present in this deposit?

Accepted Answer

A)  6.07 × 1021 
B)  6.07 × 1018 
C)  0.00390 
D)  1.65 × 10-22 
A)  6.07 × 1021 
B)  6.07 × 1018 
C)  0.00390 
D)  1.65 × 10-22

Question 14

What is the formula weight of aluminum sulfate, Al2(SO4)3?

Accepted Answer

A)  75.1 amu 
B)  150.2 amu 
C)  342.2 amu 
D)  369.7 amu 
A)  75.1 amu 
B)  150.2 amu 
C)  342.2 amu 
D)  369.7 amu

Question 15

Which of the following is true of a voltaic cell?

Accepted Answer

A)  The anode is the positive electrode and is the place where reduction occurs. 
B)  The anode is the positive electrode and is the place where oxidation occurs. 
C)  The cathode is the positive electrode and is the place where reduction occurs. 
D)  The cathode is the positive electrode and is the place where oxidation occurs. 
A)  The anode is the positive electrode and is the place where reduction occurs. 
B)  The anode is the positive electrode and is the place where oxidation occurs. 
C)  The cathode is the positive electrode and is the place where reduction occurs. 
D)  The cathode is the positive electrode and is the place where oxidation occurs.

Question 16

When solutions of H2SO4 and NaOH react, the balanced molecular equation is as follows: H2SO4(aq) + 2NaOH(aq) → Na2SO4(aq) + 2H2O(l)
How much Na2SO4 is obtained when 4.00 g of H2SO4 reacts with 2.00 g of NaOH?

Accepted Answer

A)  0.650 g 
B)  2.98 g 
C)  3.55 g 
D)  4.20 g 
A)  0.650 g 
B)  2.98 g 
C)  3.55 g 
D)  4.20 g

Question 17

What is the molecular weight of ibuprofen, C13H18O2?

Accepted Answer

A)  29.0 amu 
B)  206.3 amu 
C)  289.4 amu 
D)  377.7 amu 
A)  29.0 amu 
B)  206.3 amu 
C)  289.4 amu 
D)  377.7 amu

Question 18

Which of the following is true of spectator ions?

Accepted Answer

A)  Spectator ions form solids that are insoluble in water. 
B)  Spectator ions form gases that escape the reaction mixtures. 
C)  One spectator ion oxidizes the other spectator ion. 
D)  Spectator ions do not participate in a reaction. 
A)  Spectator ions form solids that are insoluble in water. 
B)  Spectator ions form gases that escape the reaction mixtures. 
C)  One spectator ion oxidizes the other spectator ion. 
D)  Spectator ions do not participate in a reaction.

Question 19

A white precipitate of lead chloride, PbCl2, is formed when a solution of ammonium chloride, NH4Cl, is added to a solution of lead(II) nitrate, Pb(NO3)2. Which of the following is the net ionic equation for this reaction?

Accepted Answer

A)  2NH4Cl(aq) + Pb(NO3)2(aq) → PbCl2(s) + 2NH4NO3(aq) 
B)  2NH4+(aq) + 2Cl-(aq) + Pb2+(aq) + 2NO3-(aq) →PbCl2(s) + 2NH4+(aq) + 2NO3-(aq) 
C)  Pb2+(aq) + 2Cl-(aq) → PbCl2(s) 
D)  Pb2+(aq) + Cl22-(aq) → PbCl2(s) 
A)  2NH4Cl(aq) + Pb(NO3)2(aq) → PbCl2(s) + 2NH4NO3(aq) 
B)  2NH4+(aq) + 2Cl-(aq) + Pb2+(aq) + 2NO3-(aq) →PbCl2(s) + 2NH4+(aq) + 2NO3-(aq) 
C)  Pb2+(aq) + 2Cl-(aq) → PbCl2(s) 
D)  Pb2+(aq) + Cl22-(aq) → PbCl2(s)

Question 20

When solutions of AgNO3 and NaCl react, the balanced molecular equation is as follows: AgNO3(aq) + NaCl(aq) → AgCl(s) + NaNO3(aq)
How much AgCl is produced when 3.10 g of AgNO3 and 3.10 g of NaCl react?

Accepted Answer

A)  1.55 g 
B)  2.62 g 
C)  4.17 g 
D)  6.20 g 
A)  1.55 g 
B)  2.62 g 
C)  4.17 g 
D)  6.20 g

Exam 4: Chemical Reactions

Which of the following is oxidation?

How much does a sample of 5.75 mol diethyl ether, C4H10O, weigh?

Which of the following is analogous to the reactants in a chemical reaction?

What is the molar mass of glucose, C6H12O6?

A certain protein has a molar mass of 2.38 × 105 g. What is the mass of one molecule of this protein?

Consider the following representation of a voltaic cell. This voltaic cell is represented by the following reaction: Mg(s) + Cu2+(aq) → Cu(s) + Mg2+(aq) ​ Which of the following is true of the Mg(s) shown in the reaction representing the voltaic cell?

How many moles of marble, CaCO3, are there in a 275-g piece of marble?

The metabolism of one mole of glucose, C6H12O6, releases 6.70 × 102 kcal of heat. How much heat is released by the combustion of 50.0 g of glucose?

A substance weighing 1 kg is initially at 25°C. Heat of 11,000 cal of is added to it. What is the final temperature of the substance? The specific heat of the substance is 0.20 cal/g·°C.

The products of the reaction of phosphoric acid, H3PO4(aq), and solid magnesium hydroxide, Mg(OH)2(s), are aqueous magnesium phosphate and water. What is the balanced equation for this reaction?

The combustion of one mole of propane, C3H8, releases 531 kcal of heat. How much heat is released by the combustion of 4.40 g of propane?

Lime, CaO, is produced by the reaction CaCO3(s) → CaO(s) + CO2(g). What weight of CO2 is obtained by the decomposition of 38.7 g of CaCO3?

A typical deposit of cholesterol, C27H46O, in an artery has a mass of 3.90 mg. How many molecules of cholesterol are present in this deposit?

What is the formula weight of aluminum sulfate, Al2(SO4)3?

Which of the following is true of a voltaic cell?

When solutions of H2SO4 and NaOH react, the balanced molecular equation is as follows: H2SO4(aq) + 2NaOH(aq) → Na2SO4(aq) + 2H2O(l) How much Na2SO4 is obtained when 4.00 g of H2SO4 reacts with 2.00 g of NaOH?

What is the molecular weight of ibuprofen, C13H18O2?

Which of the following is true of spectator ions?

A white precipitate of lead chloride, PbCl2, is formed when a solution of ammonium chloride, NH4Cl, is added to a solution of lead(II) nitrate, Pb(NO3)2. Which of the following is the net ionic equation for this reaction?

When solutions of AgNO3 and NaCl react, the balanced molecular equation is as follows: AgNO3(aq) + NaCl(aq) → AgCl(s) + NaNO3(aq) How much AgCl is produced when 3.10 g of AgNO3 and 3.10 g of NaCl react?

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How much does a sample of 5.75 mol diethyl ether, C₄H₁₀O, weigh?

What is the molar mass of glucose, C₆H₁₂O₆?

A certain protein has a molar mass of 2.38 × 10⁵ g. What is the mass of one molecule of this protein?

Consider the following representation of a voltaic cell. This voltaic cell is represented by the following reaction: Mg(s) + Cu²⁺(aq) → Cu(s) + Mg²⁺(aq) Which of the following is true of the Mg(s) shown in the reaction representing the voltaic cell?

How many moles of marble, CaCO₃, are there in a 275-g piece of marble?

The metabolism of one mole of glucose, C₆H₁₂O₆, releases 6.70 × 10² kcal of heat. How much heat is released by the combustion of 50.0 g of glucose?

The products of the reaction of phosphoric acid, H₃PO₄(aq), and solid magnesium hydroxide, Mg(OH)₂(s), are aqueous magnesium phosphate and water. What is the balanced equation for this reaction?

The combustion of one mole of propane, C₃H₈, releases 531 kcal of heat. How much heat is released by the combustion of 4.40 g of propane?

Lime, CaO, is produced by the reaction CaCO₃(s) → CaO(s) + CO₂(g). What weight of CO₂ is obtained by the decomposition of 38.7 g of CaCO₃?

A typical deposit of cholesterol, C₂₇H₄₆O, in an artery has a mass of 3.90 mg. How many molecules of cholesterol are present in this deposit?

What is the formula weight of aluminum sulfate, Al₂(SO₄)₃?

When solutions of H₂SO₄ and NaOH react, the balanced molecular equation is as follows: H₂SO₄(aq) + 2NaOH(aq) → Na₂SO₄(aq) + 2H₂O(l) How much Na₂SO₄ is obtained when 4.00 g of H₂SO₄ reacts with 2.00 g of NaOH?

What is the molecular weight of ibuprofen, C₁₃H₁₈O₂?

A white precipitate of lead chloride, PbCl₂, is formed when a solution of ammonium chloride, NH₄Cl, is added to a solution of lead(II) nitrate, Pb(NO₃)₂. Which of the following is the net ionic equation for this reaction?

When solutions of AgNO₃ and NaCl react, the balanced molecular equation is as follows: AgNO₃(aq) + NaCl(aq) → AgCl(s) + NaNO₃(aq) How much AgCl is produced when 3.10 g of AgNO₃ and 3.10 g of NaCl react?