Question 1

How many oxygen atoms are contained in 2.74 g of Al2(SO4)3?

Accepted Answer

A) 12 
B) 6.02 × 1023 
C) 7.22 × 1024 
D) 5.79 × 1022 
E) 8.01 × 10-3 
A) 12 
B) 6.02 × 1023 
C) 7.22 × 1024 
D) 5.79 × 1022 
E) 8.01 × 10-3

Question 2

The formula weight of silver chromate (Ag2CrO4)is ________ amu.

Accepted Answer

A) 159.87 
B) 223.87 
C) 331.73 
D) 339.86 
E) 175.87 
A) 159.87 
B) 223.87 
C) 331.73 
D) 339.86 
E) 175.87

Question 3

How many grams of oxygen are in 56 g of C2H2O2?

Accepted Answer

A) 11 
B) 58 
C) 15 
D) 31 
E) 33 
A) 11 
B) 58 
C) 15 
D) 31 
E) 33

Question 4

The quantity of product that is calculated to form when all of the limiting reagent reacts is called the percent yield.

Accepted Answer

A) True 
 B)False

Question 5

Under appropriate conditions,nitrogen and hydrogen undergo a combination reaction to yield ammonia: N2 (g)+ 3H2 (g)→ 2NH3 (g)
Determine the mass of N2 (g)required to completely react with 18.5 g of H2.

Accepted Answer

A) 0.51 
B) 771 
C) 257 
D) 85.7 
E) 6.17 
A) 0.51 
B) 771 
C) 257 
D) 85.7 
E) 6.17

Question 6

Balance the following reaction and determine the coefficient of potassium hydroxide. K (s)+ H2O (l)→ KOH (aq)+ H2 (g)

Accepted Answer

A) 1 
B) 2 
C) 3 
D) 4 
E) 5 
A) 1 
B) 2 
C) 3 
D) 4 
E) 5

Question 7

Calcium oxide reacts with water in a combination reaction to produce calcium hydroxide: CaO (s)+ H2O (l)→ Ca(OH)2 (s)
In a particular experiment,a 2.00-g sample of CaO is reacted with excess water and 2.14 g of Ca(OH)2 is recovered.What is the percent yield in this experiment?

Accepted Answer

A) 107 
B) 1.07 
C) 2.88 
D) 81.1 
E) 93.3 
A) 107 
B) 1.07 
C) 2.88 
D) 81.1 
E) 93.3

Question 8

How many grams of sodium carbonate contain 1.773 × 1017 carbon atoms?

Accepted Answer

A) 3.121 × 10-5 
B) 1.011 × 10-5 
C) 1.517 × 10-5 
D) 9.100 × 10-5 
E) 6.066 × 10-5 
A) 3.121 × 10-5 
B) 1.011 × 10-5 
C) 1.517 × 10-5 
D) 9.100 × 10-5 
E) 6.066 × 10-5

Question 9

The empirical weight is always a whole-number multiple of the molecular formula weight.

Accepted Answer

A) True 
 B)False

Question 10

When the following equation is balanced,the coefficient of water is ________. K (s)+ H2O (l)→ KOH (aq)+ H2 (g)

Accepted Answer

A) 1 
B) 2 
C) 3 
D) 4 
E) 5 
A) 1 
B) 2 
C) 3 
D) 4 
E) 5

Question 11

Silver nitrate and aluminum chloride react with each other by exchanging anions: 3AgNO3 (aq)+ AlCl3 (aq)→ Al(NO3)3 (aq)+ 3AgCl (s)
What mass in grams of AgCl is produced when 4.22 g of AgNO3 react with 7.73 g of AlCl3?

Accepted Answer

A) 2.76 
B) 28.5 
C) 24.9 
D) 3.56 
E) 11.9 
A) 2.76 
B) 28.5 
C) 24.9 
D) 3.56 
E) 11.9

Question 12

How many sulfur dioxide molecules are there in 1.80 mol of sulfur dioxide?

Accepted Answer

A) 1.08 × 1023 
B) 6.02 × 1024 
C) 1.80 × 1024 
D) 1.08 × 1024 
E) 6.02 × 1023 
A) 1.08 × 1023 
B) 6.02 × 1024 
C) 1.80 × 1024 
D) 1.08 × 1024 
E) 6.02 × 1023

Question 13

How many atoms of carbon are in 23.1 g of glucose (C6H12O6)?

Accepted Answer

A) 7.72 × 1022 
B) 4.63 × 1023 
C) 1.29 × 1022 
D) 6.00 
E) 138.6 
A) 7.72 × 1022 
B) 4.63 × 1023 
C) 1.29 × 1022 
D) 6.00 
E) 138.6

Question 14

When the following equation is balanced,the coefficient of HCl is ________. CaCO3 (s)+ HCl (aq)→ CaCl2 (aq)+ CO2 (g)+ H2O (l)

Accepted Answer

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

Question 15

Which one of the following is not true concerning automotive air bags?

Accepted Answer

A) They are inflated as a result of a decomposition reaction. 
B) They are loaded with sodium azide initially. 
C) The gas used for inflating them is oxygen. 
D) The two products of the decomposition reaction are sodium and nitrogen. 
E) A gas is produced when the air bag activates. 
A) They are inflated as a result of a decomposition reaction. 
B) They are loaded with sodium azide initially. 
C) The gas used for inflating them is oxygen. 
D) The two products of the decomposition reaction are sodium and nitrogen. 
E) A gas is produced when the air bag activates.

Question 16

When the following equation is balanced,the coefficient of oxygen is ________. PbS (s)+ O2 (g)→ PbO (s)+ SO2 (g)

Accepted Answer

A) 1 
B) 3 
C) 2 
D) 4 
E) 5 
A) 1 
B) 3 
C) 2 
D) 4 
E) 5

Question 17

Lead (II)carbonate decomposes to give lead (II)oxide and carbon dioxide: PbCO3 (s)→ PbO (s)+ CO2 (g)
If the reaction yield is 92.4%,how many grams of lead (II)oxide will be produced by the decomposition of 1.30 g of lead (II)carbonate?

Accepted Answer

A) 1.00 
B) 1.18 
C) 1.20 
D) 1.09 
E) 1.41 
A) 1.00 
B) 1.18 
C) 1.20 
D) 1.09 
E) 1.41

Question 18

How many molecules of CH4 are in 48.2 g of this compound?

Accepted Answer

A) 5.00 × 10-24 
B) 2.00 × 1023 
C) 4.64 × 1026 
D) 1.81 × 1024 
E) 4.00 
A) 5.00 × 10-24 
B) 2.00 × 1023 
C) 4.64 × 1026 
D) 1.81 × 1024 
E) 4.00

Question 19

When the following equation is balanced,the coefficient of H2O is ________. Ca (s)+ H2O (l)→ Ca(OH)2 (aq)+ H2 (g)

Accepted Answer

A) 1 
B) 2 
C) 3 
D) 5 
E) 4 
A) 1 
B) 2 
C) 3 
D) 5 
E) 4

Question 20

What is the maximum number of moles of SO3 that can be produced by the reaction of 2.0 mol of S with   of O2?

Accepted Answer

A) 2/3 
B) 1.0 
C) 5.0 
D) 3.0 
E) 2.0 
A) 2/3 
B) 1.0 
C) 5.0 
D) 3.0 
E) 2.0

Exam 3: Chemical Reactions and Reaction Stoichiometry

How many oxygen atoms are contained in 2.74 g of Al2(SO4)3?

The formula weight of silver chromate (Ag2CrO4)is ________ amu.

How many grams of oxygen are in 56 g of C2H2O2?

The quantity of product that is calculated to form when all of the limiting reagent reacts is called the percent yield.

Under appropriate conditions,nitrogen and hydrogen undergo a combination reaction to yield ammonia: N2 (g)+ 3H2 (g)→ 2NH3 (g) Determine the mass of N2 (g)required to completely react with 18.5 g of H2.

Balance the following reaction and determine the coefficient of potassium hydroxide. K (s)+ H2O (l)→ KOH (aq)+ H2 (g)

Calcium oxide reacts with water in a combination reaction to produce calcium hydroxide: CaO (s)+ H2O (l)→ Ca(OH)2 (s) In a particular experiment,a 2.00-g sample of CaO is reacted with excess water and 2.14 g of Ca(OH)2 is recovered.What is the percent yield in this experiment?

How many grams of sodium carbonate contain 1.773 × 1017 carbon atoms?

The empirical weight is always a whole-number multiple of the molecular formula weight.

When the following equation is balanced,the coefficient of water is ________. K (s)+ H2O (l)→ KOH (aq)+ H2 (g)

Silver nitrate and aluminum chloride react with each other by exchanging anions: 3AgNO3 (aq)+ AlCl3 (aq)→ Al(NO3)3 (aq)+ 3AgCl (s) What mass in grams of AgCl is produced when 4.22 g of AgNO3 react with 7.73 g of AlCl3?

How many sulfur dioxide molecules are there in 1.80 mol of sulfur dioxide?

How many atoms of carbon are in 23.1 g of glucose (C6H12O6)?

When the following equation is balanced,the coefficient of HCl is ________. CaCO3 (s)+ HCl (aq)→ CaCl2 (aq)+ CO2 (g)+ H2O (l)

Which one of the following is not true concerning automotive air bags?

When the following equation is balanced,the coefficient of oxygen is ________. PbS (s)+ O2 (g)→ PbO (s)+ SO2 (g)

Lead (II)carbonate decomposes to give lead (II)oxide and carbon dioxide: PbCO3 (s)→ PbO (s)+ CO2 (g) If the reaction yield is 92.4%,how many grams of lead (II)oxide will be produced by the decomposition of 1.30 g of lead (II)carbonate?

How many molecules of CH4 are in 48.2 g of this compound?

When the following equation is balanced,the coefficient of H2O is ________. Ca (s)+ H2O (l)→ Ca(OH)2 (aq)+ H2 (g)

What is the maximum number of moles of SO3 that can be produced by the reaction of 2.0 mol of S with of O2?

Introduction: Matter, energy, and Measurement

Atoms, molecules, and Ions

Reactions in Aqueous Solution

Thermochemistry

Electronic Structure of Atoms

Periodic Properties of the Elements

Basic Concepts of Chemical Bonding

Molecular Geometry and Bonding Theories

Gases

Liquids and Intermolecular Forces

Solids and Modern Materials

Properties of Solutions

Chemical Kinetics

Chemical Equilibrium

Acid-Base Equilibria

Additional Aspects of Aqueous Equilibria

Chemistry of the Environment

Chemical Thermodynamics

Electrochemistry

Nuclear Chemistry

Chemistry of the Nonmetals

Transition Metals and Coordination Chemistry

The Chemistry of Life: Organic and Biological Chemistry

Filters

How many oxygen atoms are contained in 2.74 g of Al₂(SO₄)₃?

The formula weight of silver chromate (Ag₂CrO₄)is ________ amu.

How many grams of oxygen are in 56 g of C₂H₂O₂?

Under appropriate conditions,nitrogen and hydrogen undergo a combination reaction to yield ammonia: N₂ (g)+ 3H₂ (g)→ 2NH₃ (g) Determine the mass of N₂ (g)required to completely react with 18.5 g of H₂.

Balance the following reaction and determine the coefficient of potassium hydroxide. K (s)+ H₂O (l)→ KOH (aq)+ H₂ (g)

Calcium oxide reacts with water in a combination reaction to produce calcium hydroxide: CaO (s)+ H₂O (l)→ Ca(OH)₂(s) In a particular experiment,a 2.00-g sample of CaO is reacted with excess water and 2.14 g of Ca(OH)₂ is recovered.What is the percent yield in this experiment?

How many grams of sodium carbonate contain 1.773 × 10¹⁷ carbon atoms?

When the following equation is balanced,the coefficient of water is ________. K (s)+ H₂O (l)→ KOH (aq)+ H₂ (g)

Silver nitrate and aluminum chloride react with each other by exchanging anions: 3AgNO₃ (aq)+ AlCl₃(aq)→ Al(NO₃)₃(aq)+ 3AgCl (s) What mass in grams of AgCl is produced when 4.22 g of AgNO₃ react with 7.73 g of AlCl₃?

How many atoms of carbon are in 23.1 g of glucose (C₆H₁₂O₆)?

When the following equation is balanced,the coefficient of HCl is ________. CaCO₃ (s)+ HCl (aq)→ CaCl₂ (aq)+ CO₂(g)+ H₂O (l)

When the following equation is balanced,the coefficient of oxygen is ________. PbS (s)+ O₂(g)→ PbO (s)+ SO₂(g)

Lead (II)carbonate decomposes to give lead (II)oxide and carbon dioxide: PbCO₃ (s)→ PbO (s)+ CO₂ (g) If the reaction yield is 92.4%,how many grams of lead (II)oxide will be produced by the decomposition of 1.30 g of lead (II)carbonate?

How many molecules of CH₄ are in 48.2 g of this compound?

When the following equation is balanced,the coefficient of H₂O is ________. Ca (s)+ H₂O (l)→ Ca(OH)₂(aq)+ H₂(g)

What is the maximum number of moles of SO₃that can be produced by the reaction of 2.0 mol of S with of O₂?