A sample of C3H8O that contains 200 molecules contains __________ carbon atoms.

A) 600 B) 200 C) 3.61 × 1026 D) 1.20 × 1026 E) 4.01 × 1025 A) 600 B) 200 C) 3.61 × 1026 D) 1.20 × 1026 E) 4.01 × 1025

The formula weight of calcium nitrate (Ca(NO3)2), rounded to one decimal place, is __________ amu.

A) 102.1 B) 164.0 C) 204.2 D) 150.1 E) 116.1 A) 102.1 B) 164.0 C) 204.2 D) 150.1 E) 116.1

Magnesium and nitrogen react in a combination reaction to produce magnesium nitride: 3 Mg + N2 → Mg3N2 In a particular experiment, a 10.1-g sample of N2 reacts completely. The mass of Mg consumed is __________ g.

A) 8.76 B) 26.3 C) 35.1 D) 0.92 E) 13.9 A) 8.76 B) 26.3 C) 35.1 D) 0.92 E) 13.9

The formula weight of lead nitrate (Pb(NO3)2)is __________ amu.

A) 269.2 B) 285.2 C) 317.2 D) 331.2 E) 538.4 A) 269.2 B) 285.2 C) 317.2 D) 331.2 E) 538.4

The formula of nitrobenzene is C6H5N O2. The molecular weight of this compound is __________ amu.

A) 107.11 B) 43.03 C) 109.10 D) 123.11 E) 3.06 A) 107.11 B) 43.03 C) 109.10 D) 123.11 E) 3.06

A sample of CH2F2 with a mass of 19 g contains __________ atoms of F.

A) 2.2 × 1023 B) 38 C) 3.3 × 1024 D) 4.4 × 1023 E) 9.5 A) 2.2 × 1023 B) 38 C) 3.3 × 1024 D) 4.4 × 1023 E) 9.5

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

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

When the following equation is balanced, the coefficient of H2 is __________. CO (g)+ H2 (g)→ H2O (g)+ CH4 (g)

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

A 30.5 gram sample of glucose (C6H12O6)contains __________ mol of glucose.

A) 0.424 B) 0.169 C) 5.90 D) 2.36 E) 0.136 A) 0.424 B) 0.169 C) 5.90 D) 2.36 E) 0.136

What is the mass in grams of 9.76 × 1012 atoms of naturally occurring sodium?

A) 22.99 B) 1.62 × 10-11 C) 3.73 × 10-10 D) 7.05 × 10-13 E) 2.24 × 1014 A) 22.99 B) 1.62 × 10-11 C) 3.73 × 10-10 D) 7.05 × 10-13 E) 2.24 × 1014

The combustion of propane (C3H8)in the presence of excess oxygen yields CO2 and H2O: C3H8 (g)+ 5 O2 (g)→ 3CO2 (g)+ 4 H2O (g) When 2.5 mol of O2 are consumed in their reaction, __________ mol of CO2 are produced.

A) 1.5 B) 3.0 C) 5.0 D) 6.0 E) 2.5 A) 1.5 B) 3.0 C) 5.0 D) 6.0 E) 2.5

The combustion of propane (C3H8)produces CO2 and H2O: C3H8 (g)+ 5 O2 (g)→ 3CO2 (g)+ 4 H2O (g) The reaction of 5.5 mol of O2 will produce __________ mol of H2O.

A) 5.5 B) 5.0 C) 2.0 D) 4.4 E) 1.0 A) 5.5 B) 5.0 C) 2.0 D) 4.4 E) 1.0

Sulfur and oxygen react in a combination reaction to produce sulfur trioxide, an environmental pollutant: 2S (s)+ 3O2 (g)→ 2SO3 (g) In a particular experiment, the reaction of 1.0 g S with 1.0 g O2 produced 0.80 g of SO3. The % yield in this experiment is __________.

A) 30 B) 29 C) 21 D) 88 E) 48 A) 30 B) 29 C) 21 D) 88 E) 48

The formula weight of magnesium fluoride (MgF2), rounded to one decimal place, is __________ amu.

A) 86.6 B) 43.3 C) 62.3 D) 67.6 E) 92.9 A) 86.6 B) 43.3 C) 62.3 D) 67.6 E) 92.9

Exam 3: Stoichiometry: Calculations With Chemical Formulas and Equations

Propane (C₃H₈)reacts with oxygen in the air to produce carbon dioxide and water. In a particular experiment, 38.0 grams of carbon dioxide are produced from the reaction of 22.05 grams of propane with excess oxygen. What is the % yield in this reaction?

(Multiple Choice)

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Question 61

A sample of C₃H₈O that contains 200 molecules contains __________ carbon atoms.

(Multiple Choice)

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Question 62

The formula weight of calcium nitrate (Ca(NO₃)₂), rounded to one decimal place, is __________ amu.

(Multiple Choice)

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Question 63

The formula weight of a substance is __________.

(Multiple Choice)

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Question 64

Magnesium and nitrogen react in a combination reaction to produce magnesium nitride: 3 Mg + N₂ → Mg₃N₂ In a particular experiment, a 10.1-g sample of N₂ reacts completely. The mass of Mg consumed is __________ g.

(Multiple Choice)

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Question 65

When the following equation is balanced, the coefficient of nitric acid is __________. N₂O₅ (g)+ H₂O (l)→ HNO₃ (aq)

(Multiple Choice)

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Question 66

The formula weight of lead nitrate (Pb(NO₃)₂)is __________ amu.

(Multiple Choice)

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Question 67

The formula of nitrobenzene is C₆H₅N O₂. The molecular weight of this compound is __________ amu.

(Multiple Choice)

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Question 68

A sample of CH₂F₂ with a mass of 19 g contains __________ atoms of F.

(Multiple Choice)

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Question 69

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

(Multiple Choice)

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Question 70

Gaseous argon has a density of 1.40 g/L at standard conditions. How many argon atoms are in 1.00 L of argon gas at standard conditions?

(Multiple Choice)

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Question 71

When the following equation is balanced, the coefficient of H₂ is __________. CO (g)+ H₂ (g)→ H₂O (g)+ CH₄ (g)

(Multiple Choice)

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Question 72

A 30.5 gram sample of glucose (C₆H₁₂O₆)contains __________ mol of glucose.

(Multiple Choice)

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Question 73

What is the mass in grams of 9.76 × 10¹² atoms of naturally occurring sodium?

(Multiple Choice)

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Question 74

The combustion of propane (C₃H₈)in the presence of excess oxygen yields CO₂ and H₂O: C₃H₈ (g)+ 5 O₂ (g)→ 3CO₂ (g)+ 4 H₂O (g) When 2.5 mol of O₂ are consumed in their reaction, __________ mol of CO₂ are produced.

(Multiple Choice)

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Question 75

A compound was found to contain 90.6% lead (Pb)and 9.4% oxygen. The empirical formula for this compound is __________.

(Short Answer)

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Question 76

The combustion of propane (C₃H₈)produces CO₂ and H₂O: C₃H₈ (g)+ 5 O₂ (g)→ 3CO₂ (g)+ 4 H₂O (g) The reaction of 5.5 mol of O₂ will produce __________ mol of H₂O.

(Multiple Choice)

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Question 77

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

(True/False)

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Question 78

Sulfur and oxygen react in a combination reaction to produce sulfur trioxide, an environmental pollutant: 2S (s)+ 3O₂ (g)→ 2SO₃ (g) In a particular experiment, the reaction of 1.0 g S with 1.0 g O₂ produced 0.80 g of SO₃. The % yield in this experiment is __________.

(Multiple Choice)

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Question 79

The formula weight of magnesium fluoride (MgF₂), rounded to one decimal place, is __________ amu.

(Multiple Choice)

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Question 80

Showing 61 - 80 of 170

Exam 3: Stoichiometry: Calculations With Chemical Formulas and Equations

Propane (C3H8)reacts with oxygen in the air to produce carbon dioxide and water. In a particular experiment, 38.0 grams of carbon dioxide are produced from the reaction of 22.05 grams of propane with excess oxygen. What is the % yield in this reaction?

A sample of C3H8O that contains 200 molecules contains __________ carbon atoms.

The formula weight of calcium nitrate (Ca(NO3)2), rounded to one decimal place, is __________ amu.

The formula weight of a substance is __________.

Magnesium and nitrogen react in a combination reaction to produce magnesium nitride: 3 Mg + N2 → Mg3N2 In a particular experiment, a 10.1-g sample of N2 reacts completely. The mass of Mg consumed is __________ g.

When the following equation is balanced, the coefficient of nitric acid is __________. N2O5 (g)+ H2O (l)→ HNO3 (aq)

The formula weight of lead nitrate (Pb(NO3)2)is __________ amu.

The formula of nitrobenzene is C6H5N O2. The molecular weight of this compound is __________ amu.

A sample of CH2F2 with a mass of 19 g contains __________ atoms of F.

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

Gaseous argon has a density of 1.40 g/L at standard conditions. How many argon atoms are in 1.00 L of argon gas at standard conditions?

When the following equation is balanced, the coefficient of H2 is __________. CO (g)+ H2 (g)→ H2O (g)+ CH4 (g)

A 30.5 gram sample of glucose (C6H12O6)contains __________ mol of glucose.

What is the mass in grams of 9.76 × 1012 atoms of naturally occurring sodium?

The combustion of propane (C3H8)in the presence of excess oxygen yields CO2 and H2O: C3H8 (g)+ 5 O2 (g)→ 3CO2 (g)+ 4 H2O (g) When 2.5 mol of O2 are consumed in their reaction, __________ mol of CO2 are produced.

A compound was found to contain 90.6% lead (Pb)and 9.4% oxygen. The empirical formula for this compound is __________.

The combustion of propane (C3H8)produces CO2 and H2O: C3H8 (g)+ 5 O2 (g)→ 3CO2 (g)+ 4 H2O (g) The reaction of 5.5 mol of O2 will produce __________ mol of H2O.

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

Sulfur and oxygen react in a combination reaction to produce sulfur trioxide, an environmental pollutant: 2S (s)+ 3O2 (g)→ 2SO3 (g) In a particular experiment, the reaction of 1.0 g S with 1.0 g O2 produced 0.80 g of SO3. The % yield in this experiment is __________.

The formula weight of magnesium fluoride (MgF2), rounded to one decimal place, is __________ amu.

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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Propane (C₃H₈)reacts with oxygen in the air to produce carbon dioxide and water. In a particular experiment, 38.0 grams of carbon dioxide are produced from the reaction of 22.05 grams of propane with excess oxygen. What is the % yield in this reaction?

A sample of C₃H₈O that contains 200 molecules contains __________ carbon atoms.

The formula weight of calcium nitrate (Ca(NO₃)₂), rounded to one decimal place, is __________ amu.

Magnesium and nitrogen react in a combination reaction to produce magnesium nitride: 3 Mg + N₂ → Mg₃N₂ In a particular experiment, a 10.1-g sample of N₂ reacts completely. The mass of Mg consumed is __________ g.

When the following equation is balanced, the coefficient of nitric acid is __________. N₂O₅ (g)+ H₂O (l)→ HNO₃ (aq)

The formula weight of lead nitrate (Pb(NO₃)₂)is __________ amu.

The formula of nitrobenzene is C₆H₅N O₂. The molecular weight of this compound is __________ amu.

A sample of CH₂F₂ with a mass of 19 g contains __________ atoms of F.

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

When the following equation is balanced, the coefficient of H₂ is __________. CO (g)+ H₂ (g)→ H₂O (g)+ CH₄ (g)

A 30.5 gram sample of glucose (C₆H₁₂O₆)contains __________ mol of glucose.

What is the mass in grams of 9.76 × 10¹² atoms of naturally occurring sodium?

The combustion of propane (C₃H₈)in the presence of excess oxygen yields CO₂ and H₂O: C₃H₈ (g)+ 5 O₂ (g)→ 3CO₂ (g)+ 4 H₂O (g) When 2.5 mol of O₂ are consumed in their reaction, __________ mol of CO₂ are produced.

The combustion of propane (C₃H₈)produces CO₂ and H₂O: C₃H₈ (g)+ 5 O₂ (g)→ 3CO₂ (g)+ 4 H₂O (g) The reaction of 5.5 mol of O₂ will produce __________ mol of H₂O.

Sulfur and oxygen react in a combination reaction to produce sulfur trioxide, an environmental pollutant: 2S (s)+ 3O₂ (g)→ 2SO₃ (g) In a particular experiment, the reaction of 1.0 g S with 1.0 g O₂ produced 0.80 g of SO₃. The % yield in this experiment is __________.

The formula weight of magnesium fluoride (MgF₂), rounded to one decimal place, is __________ amu.