Question 1

A 17.6-g sample of ammonium carbonate contains __________ mol of ammonium ions.

Accepted Answer

A) 0.366 
B) 0.183 
C) 0.176 
D) 2.14 
E) 3.47 
A) 0.366 
B) 0.183 
C) 0.176 
D) 2.14 
E) 3.47

Question 2

When the following equation is balanced, the coefficient of H2 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 3

Lithium and nitrogen react to produce lithium nitride: 6Li (s)+ N2 (g)→ 2Li3N (s)
How many moles of lithium nitride are produced when 0.400 mol of lithium react in this fashion?

Accepted Answer

A) 0.133 
B) 0.800 
C) 0.0667 
D) 1.20 
E) 0.200 
A) 0.133 
B) 0.800 
C) 0.0667 
D) 1.20 
E) 0.200

Question 4

How many oxygen atoms are there in 52.06 g of carbon dioxide?

Accepted Answer

A) 1.424 × 1024 
B) 6.022 × 1023 
C) 1.204 × 1024 
D) 5.088 × 1023 
E) 1.018 × 1024 
A) 1.424 × 1024 
B) 6.022 × 1023 
C) 1.204 × 1024 
D) 5.088 × 1023 
E) 1.018 × 1024

Question 5

The molecular weight of glucose (C6H12O6), rounded to the nearest integer, is __________ amu.

Accepted Answer

A) 24 
B) 96 
C) 136 
D) 180 
E) 224 
A) 24 
B) 96 
C) 136 
D) 180 
E) 224

Question 6

Which of the following are combination reactions? 1)CH4 (g)+ O2 (g)→ CO2 (g)+ H2O (l)
2)CaO (s)+ CO2 (g)→ CaCO3 (s)
3)Mg (s)+ O2 (g)→ MgO (s)
4)PbCO3 (s)→ PbO (s)+ CO2 (g)

Accepted Answer

A) 1, 2, and 3 
B) 2 and 3 
C) 1, 2, 3, and 4 
D) 4 only 
E) 2, 3, and 4 
A) 1, 2, and 3 
B) 2 and 3 
C) 1, 2, 3, and 4 
D) 4 only 
E) 2, 3, and 4

Question 7

Sulfur and fluorine react in a combination reaction to produce sulfur hexafluoride: S (s)+ 3F2 (g)→ SF6 (g)
In a particular experiment, the percent yield is 79.0%. This means that in this experiment, a 7.90-g sample of fluorine yields __________ g of SF6.

Accepted Answer

A) 30.3 
B) 10.1 
C) 7.99 
D) 24.0 
E) 0.110 
A) 30.3 
B) 10.1 
C) 7.99 
D) 24.0 
E) 0.110

Question 8

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

Accepted Answer

A) True 
 B)False

Question 9

Automotive air bags inflate when sodium azide decomposes explosively to its constituent elements: 2NaN3 (s)→ 2Na (s)+ 3N2 (g)
How many moles of H2 are produced by the decomposition of 3.55 mol of sodium azide?

Accepted Answer

A) 2.37 
B) 10.7 
C) 5.33 
D) 1.18 
E) 1.78 
A) 2.37 
B) 10.7 
C) 5.33 
D) 1.18 
E) 1.78

Question 10

There are __________ atoms of oxygen are in 300 molecules of CH3CO2H.

Accepted Answer

A) 300 
B) 600 
C) 3.01 × 1024 
D) 3.61 × 1026 
E) 1.80 × 1026 
A) 300 
B) 600 
C) 3.01 × 1024 
D) 3.61 × 1026 
E) 1.80 × 1026

A 17.6-g sample of ammonium carbonate contains __________ mol of ammonium ions.

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

Lithium and nitrogen react to produce lithium nitride: 6Li (s)+ N₂ (g)→ 2Li₃N (s) How many moles of lithium nitride are produced when 0.400 mol of lithium react in this fashion?

How many oxygen atoms are there in 52.06 g of carbon dioxide?

The molecular weight of glucose (C₆H₁₂O₆), rounded to the nearest integer, is __________ amu.

Which of the following are combination reactions? 1)CH₄ (g)+ O₂ (g)→ CO₂ (g)+ H₂O (l) 2)CaO (s)+ CO₂ (g)→ CaCO₃ (s) 3)Mg (s)+ O₂ (g)→ MgO (s) 4)PbCO₃ (s)→ PbO (s)+ CO₂ (g)

Sulfur and fluorine react in a combination reaction to produce sulfur hexafluoride: S (s)+ 3F₂ (g)→ SF₆ (g) In a particular experiment, the percent yield is 79.0%. This means that in this experiment, a 7.90-g sample of fluorine yields __________ g of SF₆.

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

Automotive air bags inflate when sodium azide decomposes explosively to its constituent elements: 2NaN₃ (s)→ 2Na (s)+ 3N₂ (g) How many moles of H₂ are produced by the decomposition of 3.55 mol of sodium azide?

There are __________ atoms of oxygen are in 300 molecules of CH₃CO₂H.

Introduction: Matter and Measurement

Atoms, Molecules, and Ions

Aqueous Reactions and Solution Stoichiometry

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

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Exam 3: Stoichiometry: Calculations With Chemical Formulas and Equations

A 17.6-g sample of ammonium carbonate contains __________ mol of ammonium ions.

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

Lithium and nitrogen react to produce lithium nitride: 6Li (s)+ N2 (g)→ 2Li3N (s) How many moles of lithium nitride are produced when 0.400 mol of lithium react in this fashion?

How many oxygen atoms are there in 52.06 g of carbon dioxide?

The molecular weight of glucose (C6H12O6), rounded to the nearest integer, is __________ amu.

Which of the following are combination reactions? 1)CH4 (g)+ O2 (g)→ CO2 (g)+ H2O (l) 2)CaO (s)+ CO2 (g)→ CaCO3 (s) 3)Mg (s)+ O2 (g)→ MgO (s) 4)PbCO3 (s)→ PbO (s)+ CO2 (g)

Sulfur and fluorine react in a combination reaction to produce sulfur hexafluoride: S (s)+ 3F2 (g)→ SF6 (g) In a particular experiment, the percent yield is 79.0%. This means that in this experiment, a 7.90-g sample of fluorine yields __________ g of SF6.

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

Automotive air bags inflate when sodium azide decomposes explosively to its constituent elements: 2NaN3 (s)→ 2Na (s)+ 3N2 (g) How many moles of H2 are produced by the decomposition of 3.55 mol of sodium azide?

There are __________ atoms of oxygen are in 300 molecules of CH3CO2H.

Introduction: Matter and Measurement

Atoms, Molecules, and Ions

Aqueous Reactions and Solution Stoichiometry

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

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

Lithium and nitrogen react to produce lithium nitride: 6Li (s)+ N₂ (g)→ 2Li₃N (s) How many moles of lithium nitride are produced when 0.400 mol of lithium react in this fashion?

The molecular weight of glucose (C₆H₁₂O₆), rounded to the nearest integer, is __________ amu.

Which of the following are combination reactions? 1)CH₄ (g)+ O₂ (g)→ CO₂ (g)+ H₂O (l) 2)CaO (s)+ CO₂ (g)→ CaCO₃ (s) 3)Mg (s)+ O₂ (g)→ MgO (s) 4)PbCO₃ (s)→ PbO (s)+ CO₂ (g)

Sulfur and fluorine react in a combination reaction to produce sulfur hexafluoride: S (s)+ 3F₂ (g)→ SF₆ (g) In a particular experiment, the percent yield is 79.0%. This means that in this experiment, a 7.90-g sample of fluorine yields __________ g of SF₆.

Automotive air bags inflate when sodium azide decomposes explosively to its constituent elements: 2NaN₃ (s)→ 2Na (s)+ 3N₂ (g) How many moles of H₂ are produced by the decomposition of 3.55 mol of sodium azide?

There are __________ atoms of oxygen are in 300 molecules of CH₃CO₂H.