Question 1

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 2

A person drinks 1.50 × 103 g of water, H2O, per day. How many moles is this?

Accepted Answer

A)  0.0120 
B)  8.33 
C)  83.3 
D)  1.20 × 102 
A)  0.0120 
B)  8.33 
C)  83.3 
D)  1.20 × 102

Question 3

In the image are several types of burners used in many chemistry laboratories.  
-Whether these burners use natural gas, propane or butane as a fuel, which of the following is true?

Accepted Answer

A)  The reactions are classified as combustion reactions. 
B)  The reactions are classified as redox reactions. 
C)  The reactions are classified as exothermic. 
D)  All of the these statements are correct. 
A)  The reactions are classified as combustion reactions. 
B)  The reactions are classified as redox reactions. 
C)  The reactions are classified as exothermic. 
D)  All of the these statements are correct.

Question 4

Given the reaction 2 HgO(s) → 2 Hg(l) + O2(g). What weight of elemental mercury will be obtained by the decomposition of 0.125 mol of HgO?

Accepted Answer

A)  13.5 g 
B)  25.0 g 
C)  27.0 g 
D)  50.0 g 
A)  13.5 g 
B)  25.0 g 
C)  27.0 g 
D)  50.0 g

Question 5

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 6

In the industrial synthesis of acetic acid, methanol is reacted with carbon monoxide. The balanced equation for this reaction is: CH3OH(g) + CO(g) → CH3COOH(l)
How many grams of CO(g) are required to produce 49.4 g of acetic acid?

Accepted Answer

A)  23.0 g 
B)  28.0 g 
C)  60.1 g 
D)  88.1 g 
A)  23.0 g 
B)  28.0 g 
C)  60.1 g 
D)  88.1 g

Question 7

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

Accepted Answer

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

Question 8

Which of the following is the correct unit for formula weight?

Accepted Answer

A)  atomic mass units 
B)  grams 
C)  ounces 
D)  pounds 
A)  atomic mass units 
B)  grams 
C)  ounces 
D)  pounds

Question 9

Which of the following is true of acetate salts and nitrate salts?

Accepted Answer

A)  All acetate salts are soluble but all nitrate salts are insoluble. 
B)  All nitrate salts are soluble but all acetate salts are insoluble. 
C)  All acetate salts and all nitrate salts are soluble. 
D)  All acetate salts and all nitrate salts are insoluble. 
A)  All acetate salts are soluble but all nitrate salts are insoluble. 
B)  All nitrate salts are soluble but all acetate salts are insoluble. 
C)  All acetate salts and all nitrate salts are soluble. 
D)  All acetate salts and all nitrate salts are insoluble.

Question 10

The molar mass of gold is approximately 197 G) What is the approximate mass of one atom of gold?

Accepted Answer

A)  3.06 × 1021 g 
B)  197 g 
C)  5.08 × 10-3 g 
D)  3.27 × 10-22 g 
A)  3.06 × 1021 g 
B)  197 g 
C)  5.08 × 10-3 g 
D)  3.27 × 10-22 g

Question 11

O2 can be produced by the reaction 2 KClO3(s) → 2 KCl(s) + 3 O2(g). In one experiment 0.312 g of O2 was formed. How much KCl was produced?

Accepted Answer

A)  0.484 g 
B)  0.797 g 
C)  1.19 g 
D)  1.79 g 
A)  0.484 g 
B)  0.797 g 
C)  1.19 g 
D)  1.79 g

Question 12

The molecular weight of ethylene glycol is 62.0 amu. What is the mass of one molecule of ethylene glycol?

Accepted Answer

A)  9.70 × 1021 g 
B)  62.0 g 
C)  0.0161 g 
D)  1.03 × 10-22 g 
A)  9.70 × 1021 g 
B)  62.0 g 
C)  0.0161 g 
D)  1.03 × 10-22 g

Question 13

When an acid is added to a solution, no gas is formed. Which of the following ions cannot be in the solution?

Accepted Answer

A)  CO32- 
B)  PO43- 
C)  SO42- 
D)  none of these 
A)  CO32- 
B)  PO43- 
C)  SO42- 
D)  none of these

Question 14

Sodium sulfite, Na2SO3(aq), is added to wine as an antioxidant since it reacts with the oxygen of the air to form sodium sulfate, Na2SO4(aq). Which of the following is the balanced equation for this reaction?

Accepted Answer

A)  Na2SO3(aq) + O(g) → Na2SO4(aq) 
B)  Na2SO3(aq) + 2 O(g) → Na2SO4(aq) 
C)  2 Na2SO3(aq) + O2(g) → 2 Na2SO4(aq) 
D)  Na2SO3(aq) + O2(g) → Na2SO4(aq) 
A)  Na2SO3(aq) + O(g) → Na2SO4(aq) 
B)  Na2SO3(aq) + 2 O(g) → Na2SO4(aq) 
C)  2 Na2SO3(aq) + O2(g) → 2 Na2SO4(aq) 
D)  Na2SO3(aq) + O2(g) → Na2SO4(aq)

Question 15

The atomic weight of copper is greater than that of chromium. If you have a 10 g sample of each of these metals, which of the following is true?

Accepted Answer

A)  You have fewer of atoms of copper than of chromium. 
B)  You have equal numbers of atoms of copper and chromium. 
C)  You have more atoms of copper than of chromium. 
D)  There is insufficient information to determine which of the above is true. 
A)  You have fewer of atoms of copper than of chromium. 
B)  You have equal numbers of atoms of copper and chromium. 
C)  You have more atoms of copper than of chromium. 
D)  There is insufficient information to determine which of the above is true.

Question 16

Which of the following is the most important product of respiration?

Accepted Answer

A)  CO2(g) 
B)  H2O(g) 
C)  energy 
D)  None, these are all equally important. 
A)  CO2(g) 
B)  H2O(g) 
C)  energy 
D)  None, these are all equally important.

Question 17

In the reaction Pb(s) + 2 Ag+(aq) → Pb2+(aq) + 2 Ag(s), which species is the oxidizing agent?

Accepted Answer

A)  Pb(s) 
B)  Ag+(aq) 
C)  Pb2+(aq) 
D)  Ag(s) 
A)  Pb(s) 
B)  Ag+(aq) 
C)  Pb2+(aq) 
D)  Ag(s)

Question 18

The synthesis of a certain drug can be carried out with 91.7% yield. In one experiment 14.8 g of the drug was obtained. What was the theoretical yield for this experiment?

Accepted Answer

A)  13.6 g 
B)  15.8 g 
C)  16.1 g 
D)  16.9 g 
A)  13.6 g 
B)  15.8 g 
C)  16.1 g 
D)  16.9 g

Question 19

Which of the following is reduction?

Accepted Answer

A)  gain of electrons 
B)  loss of hydrogen 
C)  gain of oxygen 
D)  none of these 
A)  gain of electrons 
B)  loss of hydrogen 
C)  gain of oxygen 
D)  none of these

Question 20

Which of the following is the correct set of integer coefficients for the balanced equation, respectively: ___ C3H8(g) + ___O2(g) → ___CO2(g) + ___H2O(g)

Accepted Answer

A)  3, 8, 1, 2 
B)  1, 5, 3, 4 
C)  1, 5, 4, 3 
D)  4, 3, 2, 1 
A)  3, 8, 1, 2 
B)  1, 5, 3, 4 
C)  1, 5, 4, 3 
D)  4, 3, 2, 1

Exam 4: Chemical Reactions

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

A person drinks 1.50 × 103 g of water, H2O, per day. How many moles is this?

In the image are several types of burners used in many chemistry laboratories. -Whether these burners use natural gas, propane or butane as a fuel, which of the following is true?

Given the reaction 2 HgO(s) → 2 Hg(l) + O2(g). What weight of elemental mercury will be obtained by the decomposition of 0.125 mol of HgO?

What is the molar mass of glucose, C6H12O6?

In the industrial synthesis of acetic acid, methanol is reacted with carbon monoxide. The balanced equation for this reaction is: CH3OH(g) + CO(g) → CH3COOH(l) How many grams of CO(g) are required to produce 49.4 g of acetic acid?

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

Which of the following is the correct unit for formula weight?

Which of the following is true of acetate salts and nitrate salts?

The molar mass of gold is approximately 197 G) What is the approximate mass of one atom of gold?

O2 can be produced by the reaction 2 KClO3(s) → 2 KCl(s) + 3 O2(g). In one experiment 0.312 g of O2 was formed. How much KCl was produced?

The molecular weight of ethylene glycol is 62.0 amu. What is the mass of one molecule of ethylene glycol?

When an acid is added to a solution, no gas is formed. Which of the following ions cannot be in the solution?

Sodium sulfite, Na2SO3(aq), is added to wine as an antioxidant since it reacts with the oxygen of the air to form sodium sulfate, Na2SO4(aq). Which of the following is the balanced equation for this reaction?

The atomic weight of copper is greater than that of chromium. If you have a 10 g sample of each of these metals, which of the following is true?

Which of the following is the most important product of respiration?

In the reaction Pb(s) + 2 Ag+(aq) → Pb2+(aq) + 2 Ag(s), which species is the oxidizing agent?

The synthesis of a certain drug can be carried out with 91.7% yield. In one experiment 14.8 g of the drug was obtained. What was the theoretical yield for this experiment?

Which of the following is reduction?

Which of the following is the correct set of integer coefficients for the balanced equation, respectively: ___ C3H8(g) + ___O2(g) → ___CO2(g) + ___H2O(g)

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Reaction Rates and Chemical Equilibrium

Acids and Bases

Nuclear Chemistry

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Benzene and Its Derivatives

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Chirality: the Handedness of Molecules

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Carboxylic Anhydrides, Esters, and Amides

Carbohydrates

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Bioenergetics: How the Body Converts Food to Energy

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Filters

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

A person drinks 1.50 × 10³ g of water, H₂O, per day. How many moles is this?

Given the reaction 2 HgO(s) → 2 Hg(l) + O₂(g). What weight of elemental mercury will be obtained by the decomposition of 0.125 mol of HgO?

What is the molar mass of glucose, C₆H₁₂O₆?

In the industrial synthesis of acetic acid, methanol is reacted with carbon monoxide. The balanced equation for this reaction is: CH₃OH(g) + CO(g) → CH₃COOH(l) How many grams of CO(g) are required to produce 49.4 g of acetic acid?

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

O₂ can be produced by the reaction 2 KClO₃(s) → 2 KCl(s) + 3 O₂(g). In one experiment 0.312 g of O₂ was formed. How much KCl was produced?

Sodium sulfite, Na₂SO₃(aq), is added to wine as an antioxidant since it reacts with the oxygen of the air to form sodium sulfate, Na₂SO₄(aq). Which of the following is the balanced equation for this reaction?

In the reaction Pb(s) + 2 Ag⁺(aq) → Pb²⁺(aq) + 2 Ag(s), which species is the oxidizing agent?

Which of the following is the correct set of integer coefficients for the balanced equation, respectively: _ C₃H₈(g) + _O₂(g) → _CO₂(g) + _H₂O(g)