Write the balanced equation for the reaction that occurs when methanol, CH3OH (l), is burned in air. What is the coefficient of methanol in the balanced equation?

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

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

A) 2.945 × 10- 7 B) 8.836 × 10- 7 C) 5.890 × 10- 7 D) 9.817 × 10- 8 E) 1.473 × 10- 7 A) 2.945 × 10- 7 B) 8.836 × 10- 7 C) 5.890 × 10- 7 D) 9.817 × 10- 8 E) 1.473 × 10- 7

Calcium carbide (CaC2) reacts with water to produce acetylene (C2H2): Production of 13g of C2H2 requires consumption of g of H2O.

A) 9.0 B) 18 C) 4.8 × 10- 2 D) 4.8 × 102 E) 4.5 A) 9.0 B) 18 C) 4.8 × 10- 2 D) 4.8 × 102 E) 4.5

A 2.25- g sample of magnesium nitrate, Mg(NO3)2, contains mol of this compound.

A) 0.0261 B) 65.8 C) 0.0152 D) 148.3 E) 38.4 A) 0.0261 B) 65.8 C) 0.0152 D) 148.3 E) 38.4

What is the mass % of carbon in dimethylsulfoxide (C2H6SO)?

A) 79.8 B) 60.0 C) 20.6 D) 7.74 E) 30.7 A) 79.8 B) 60.0 C) 20.6 D) 7.74 E) 30.7

The molecular weight of the acetic acid (CH3CO2H) is amu.

A) 60 B) 48 C) 32 D) 44 A) 60 B) 48 C) 32 D) 44

The combustion of ammonia in the presence of excess oxygen yields NO2 and H2O: The combustion of 28.8 g of ammonia consumes g of oxygen.

A) 108 B) 94.9 C) 28.8 D) 54.1 E) 15.3 A) 108 B) 94.9 C) 28.8 D) 54.1 E) 15.3

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

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

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

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

Exam 3: Stoichiometry: Calculations With Chemical Formulas and Equations

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Write the balanced equation for the reaction that occurs when methanol, CH₃OH (l), is burned in air. What is the coefficient of methanol in the balanced equation?

(Multiple Choice)

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Question 101

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

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Question 102

What is the empirical formula of a compound that contains 49.4% K, 20.3% S, and 30.3% O by mass?

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Question 103

A compound contains 38.7% K, 13.9% N, and 47.4% O by mass. What is the empirical formula of the compound?

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Question 104

Solid aluminum and gaseous oxygen react in a combination reaction to produce aluminum oxide: In a particular experiment, the reaction of 2.5 g of Al with 2.5 g of O₂produced 3.5 g of Al₂O₃. The % yield of the reaction is .

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Question 105

Calcium carbide (CaC₂) reacts with water to produce acetylene (C₂H₂): Production of 13g of C₂H₂requires consumption of g of H₂O.

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Question 106

When the following equation is balanced, the coefficient of H₃PO₄is _ .

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Question 107

A 2.25- g sample of magnesium nitrate, Mg(NO₃)₂, contains mol of this compound.

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Question 108

When the following equation is balanced, the coefficient of hydrogen is .

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Question 109

What is the mass % of carbon in dimethylsulfoxide (C₂H₆SO)?

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Question 110

The molecular weight of the acetic acid (CH₃CO₂H) is amu.

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Question 111

Sulfur and oxygen react in a combination reaction to produce sulfur trioxide, an environmental pollutant: In a particular experiment, the reaction of 1.0 g S with 1.0 g O₂produced 0.80 g of SO₃. The % yield in this experiment is .

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Question 112

What is the empirical formula of a compound that contains 29% Na, 41% S, and 30% O by mass?

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Question 113

What is the empirical formula of a compound that is 64.8% C, 13.6% H, and 21.6% O by mass?

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Question 114

When the following equation is balanced, the coefficient of HNO₃is _ .

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Question 115

The combustion of ammonia in the presence of excess oxygen yields NO₂and H₂O: The combustion of 28.8 g of ammonia consumes g of oxygen.

(Multiple Choice)

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Question 116

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

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Question 117

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

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Question 118

When the following equation is balanced, the coefficient of C₃H₈O₃is _ .

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Question 119

When the following equation is balanced, the coefficient of nitric acid is .

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Question 120

Showing 101 - 120 of 134

Exam 3: Stoichiometry: Calculations With Chemical Formulas and Equations

Write the balanced equation for the reaction that occurs when methanol, CH3OH (l), is burned in air. What is the coefficient of methanol in the balanced equation?

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

What is the empirical formula of a compound that contains 49.4% K, 20.3% S, and 30.3% O by mass?

A compound contains 38.7% K, 13.9% N, and 47.4% O by mass. What is the empirical formula of the compound?

Solid aluminum and gaseous oxygen react in a combination reaction to produce aluminum oxide: In a particular experiment, the reaction of 2.5 g of Al with 2.5 g of O2 produced 3.5 g of Al2O3. The % yield of the reaction is .

Calcium carbide (CaC2) reacts with water to produce acetylene (C2H2): Production of 13g of C2H2 requires consumption of g of H2O.

When the following equation is balanced, the coefficient of H3PO4 is _ .

A 2.25- g sample of magnesium nitrate, Mg(NO3)2, contains mol of this compound.

When the following equation is balanced, the coefficient of hydrogen is .

What is the mass % of carbon in dimethylsulfoxide (C2H6SO)?

The molecular weight of the acetic acid (CH3CO2H) is amu.

Sulfur and oxygen react in a combination reaction to produce sulfur trioxide, an environmental pollutant: 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 .

What is the empirical formula of a compound that contains 29% Na, 41% S, and 30% O by mass?

What is the empirical formula of a compound that is 64.8% C, 13.6% H, and 21.6% O by mass?

When the following equation is balanced, the coefficient of HNO3 is _ .

The combustion of ammonia in the presence of excess oxygen yields NO2 and H2O: The combustion of 28.8 g of ammonia consumes g of oxygen.

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

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

When the following equation is balanced, the coefficient of C3H8O3 is _ .

When the following equation is balanced, the coefficient of nitric acid is .

Introduction: Matter and Measurement

Atoms, Molecules, and Ions

Aqueous Reactions and Solution Stoichiometry

Electronic Structure of Atoms

Periodic Properties of the Elements

Basic Concepts of Chemical Bonding

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Write the balanced equation for the reaction that occurs when methanol, CH₃OH (l), is burned in air. What is the coefficient of methanol in the balanced equation?

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

Solid aluminum and gaseous oxygen react in a combination reaction to produce aluminum oxide: In a particular experiment, the reaction of 2.5 g of Al with 2.5 g of O₂produced 3.5 g of Al₂O₃. The % yield of the reaction is .

Calcium carbide (CaC₂) reacts with water to produce acetylene (C₂H₂): Production of 13g of C₂H₂requires consumption of g of H₂O.

When the following equation is balanced, the coefficient of H₃PO₄is _ .

A 2.25- g sample of magnesium nitrate, Mg(NO₃)₂, contains mol of this compound.

What is the mass % of carbon in dimethylsulfoxide (C₂H₆SO)?

The molecular weight of the acetic acid (CH₃CO₂H) is amu.

Sulfur and oxygen react in a combination reaction to produce sulfur trioxide, an environmental pollutant: In a particular experiment, the reaction of 1.0 g S with 1.0 g O₂produced 0.80 g of SO₃. The % yield in this experiment is .

When the following equation is balanced, the coefficient of HNO₃is _ .

The combustion of ammonia in the presence of excess oxygen yields NO₂and H₂O: The combustion of 28.8 g of ammonia consumes g of oxygen.

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

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

When the following equation is balanced, the coefficient of C₃H₈O₃is _ .