Lithium and nitrogen react to produce lithium nitride: 6Li (s)+ N2 (g)→ 2Li3N (s) How many moles of N2 are needed to react with 0.550 mol of lithium?

A) 3.30 B) 0.550 C) 0.183 D) 1.65 E) 0.0917 A) 3.30 B) 0.550 C) 0.183 D) 1.65 E) 0.0917

How many moles of lithium phosphate (Li3PO4)are contained in 66.6 g of lithium phosphate?

A) 0.575 B) 7710 C) 1.11 × 10-22 D) 4.01 × 1025 E) 116 A) 0.575 B) 7710 C) 1.11 × 10-22 D) 4.01 × 1025 E) 116

There are ________ hydrogen atoms in 25 molecules of C4H4S2.

A) 25 B) 3.8 × 1024 C) 6.0 × 1025 D) 100 E) 1.5 × 1025 A) 25 B) 3.8 × 1024 C) 6.0 × 1025 D) 100 E) 1.5 × 1025

When the following equation is balanced,the coefficient of H2SO4 is ________. H2SO4 (aq)+ NaOH (aq)→ Na2SO4 (aq)+ H2O (l)

A) 1 B) 2 C) 3 D) 4 E) 0.5 A) 1 B) 2 C) 3 D) 4 E) 0.5

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

Calcium carbide (CaC2)reacts with water to produce acetylene (C2H2)as shown in the unbalanced reaction below: CaC2 (s)+ H2O (g)→ Ca(OH)2 (s)+ C2H2 (g) How many grams of H2O are required to completely react with 82.4 g of CaC2.

A) 1.29 B) 11.6 C) 46.3 D) 23.2 E) 18.0 A) 1.29 B) 11.6 C) 46.3 D) 23.2 E) 18.0

Which of the following are decomposition reactions? 1. CH4 (g) + O2 (g) $\rightarrow$ CO2 (g) + H2O (l) 2. CaO (s) + CO2 (g) $\rightarrow$CaCO3 (s) 3. Mg (s) + O2(g) $\rightarrow$ MgO (s) 4. PbCO3 (s) $\rightarrow$ PbO (s) + CO2 (g)

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

There are ________ oxygen atoms in 30 molecules of C20H42S3O2.

A) 6.0 × 1023 B) 1.8 × 1025 C) 3.6 × 1025 D) 1.2 × 1024 E) 60 A) 6.0 × 1023 B) 1.8 × 1025 C) 3.6 × 1025 D) 1.2 × 1024 E) 60

Lead (II)carbonate decomposes to give lead (II)oxide and carbon dioxide: PbCO3 (s)→ PbO (s)+ CO2 (g) How many grams of lead (II)oxide will be produced by the decomposition of 2.50 g of lead (II)carbonate?

A) 0.41 B) 2.50 C) 0.00936 D) 2.09 E) 2.61 A) 0.41 B) 2.50 C) 0.00936 D) 2.09 E) 2.61

Solid aluminum and gaseous oxygen react in a combination reaction to produce aluminum oxide: 4Al (s)+ 3O2 (g)→ 2Al2O3 (s) The maximum amount of Al2O3 that can be produced from 5.0 g of Al and 5.0 g of O2 is ________ g.

A) 19 B) 4.7 C) 9.4 D) 11 E) 2.5 A) 19 B) 4.7 C) 9.4 D) 11 E) 2.5

How many grams of phenol (C6H5OH)are contained in 5.50 mol of phenol?

A) 518 B) 0.0584 C) 9.14 × 10-24 D) 3.31 × 1024 E) 94.1 A) 518 B) 0.0584 C) 9.14 × 10-24 D) 3.31 × 1024 E) 94.1

A 1.038 g sample of unknown containing C,H,and O yielded 2.48 g of CO2 and 0.510 g of H2O during combustion analysis.Determine the empirical formula of the compound.

A) C3H3O B) C6H6O C) CH3O D) C6H6O2 E) C2H6O2 A) C3H3O B) C6H6O C) CH3O D) C6H6O2 E) C2H6O2

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 83.1%. This means that in this experiment,a 4.50 g sample of fluorine yields ________ g of SF6 .

A) 9.58 B) 3.74 C) 4.79 D) 43.1 E) 14.4 A) 9.58 B) 3.74 C) 4.79 D) 43.1 E) 14.4

Exam 3: Chemical Reactions and Reaction Stoichiometry

Lithium and nitrogen react to produce lithium nitride: 6Li (s)+ N₂ (g)→ 2Li₃N (s) How many moles of N₂are needed to react with 0.550 mol of lithium?

(Multiple Choice)

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Question 61

How many moles of lithium phosphate (Li₃PO₄)are contained in 66.6 g of lithium phosphate?

(Multiple Choice)

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Question 62

There are ________ hydrogen atoms in 25 molecules of C₄H₄S₂.

(Multiple Choice)

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Question 63

When the following equation is balanced,the coefficient of H₂SO₄ is ________. H₂SO₄(aq)+ NaOH (aq)→ Na₂SO₄(aq)+ H₂O (l)

(Multiple Choice)

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Question 64

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 65

Calcium carbide (CaC₂)reacts with water to produce acetylene (C₂H₂)as shown in the unbalanced reaction below: CaC₂ (s)+ H₂O (g)→ Ca(OH)₂ (s)+ C₂H₂ (g) How many grams of H₂O are required to completely react with 82.4 g of CaC₂.

(Multiple Choice)

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Question 66

There are ________ mol of carbon atoms in 5 mol of dimethylsulfoxide (C₂H₆SO).

(Multiple Choice)

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Question 67

Which of the following are decomposition reactions? 1. CH₄ (g) + O₂ (g) $\rightarrow$ CO₂ (g) + H₂O (l) 2. CaO (s) + CO₂(g) $\rightarrow$ CaCO₃ (s) 3. Mg (s) + O₂(g) $\rightarrow$ MgO (s) 4. PbCO₃ (s) $\rightarrow$ PbO (s) + CO₂ (g)

(Multiple Choice)

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Question 68

A compound contains 40.0% C,6.71% H,and 53.29% O by mass.The molecular weight of the compound is 60.05 amu.The molecular formula of this compound is ________.

(Multiple Choice)

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Question 69

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

(Multiple Choice)

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Question 70

There are ________ oxygen atoms in 30 molecules of C₂₀H₄₂S₃O₂.

(Multiple Choice)

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Question 71

Balance the following reaction and determine the coefficient of H₂O. CO (g)+ H₂(g)→ H₂O (g)+ CH₄(g)

(Multiple Choice)

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Question 72

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

(Multiple Choice)

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Question 73

Lead (II)carbonate decomposes to give lead (II)oxide and carbon dioxide: PbCO₃ (s)→ PbO (s)+ CO₂(g) How many grams of lead (II)oxide will be produced by the decomposition of 2.50 g of lead (II)carbonate?

(Multiple Choice)

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Question 74

Solid aluminum and gaseous oxygen react in a combination reaction to produce aluminum oxide: 4Al (s)+ 3O₂ (g)→ 2Al₂O₃ (s) The maximum amount of Al₂O₃ that can be produced from 5.0 g of Al and 5.0 g of O₂is ________ g.

(Multiple Choice)

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Question 75

How many grams of phenol (C₆H₅OH)are contained in 5.50 mol of phenol?

(Multiple Choice)

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Question 76

A 1.038 g sample of unknown containing C,H,and O yielded 2.48 g of CO₂ and 0.510 g of H₂O during combustion analysis.Determine the empirical formula of the compound.

(Multiple Choice)

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Question 77

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 83.1%. This means that in this experiment,a 4.50 g sample of fluorine yields ________ g of SF_{6 .}

(Multiple Choice)

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Question 78

1 mole of which of the following will contain the largest number of atoms?

(Multiple Choice)

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Question 79

One mole of ________ contains the smallest number of atoms.

(Multiple Choice)

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Question 80

Showing 61 - 80 of 178

Exam 3: Chemical Reactions and Reaction Stoichiometry

Lithium and nitrogen react to produce lithium nitride: 6Li (s)+ N2 (g)→ 2Li3N (s) How many moles of N2 are needed to react with 0.550 mol of lithium?

How many moles of lithium phosphate (Li3PO4)are contained in 66.6 g of lithium phosphate?

There are ________ hydrogen atoms in 25 molecules of C4H4S2.

When the following equation is balanced,the coefficient of H2SO4 is ________. H2SO4 (aq)+ NaOH (aq)→ Na2SO4 (aq)+ H2O (l)

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?

Calcium carbide (CaC2)reacts with water to produce acetylene (C2H2)as shown in the unbalanced reaction below: CaC2 (s)+ H2O (g)→ Ca(OH)2 (s)+ C2H2 (g) How many grams of H2O are required to completely react with 82.4 g of CaC2.

There are ________ mol of carbon atoms in 5 mol of dimethylsulfoxide (C2H6SO).

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

A compound contains 40.0% C,6.71% H,and 53.29% O by mass.The molecular weight of the compound is 60.05 amu.The molecular formula of this compound is ________.

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

There are ________ oxygen atoms in 30 molecules of C20H42S3O2.

Balance the following reaction and determine the coefficient of H2O. CO (g)+ H2 (g)→ H2O (g)+ CH4 (g)

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

Lead (II)carbonate decomposes to give lead (II)oxide and carbon dioxide: PbCO3 (s)→ PbO (s)+ CO2 (g) How many grams of lead (II)oxide will be produced by the decomposition of 2.50 g of lead (II)carbonate?

Solid aluminum and gaseous oxygen react in a combination reaction to produce aluminum oxide: 4Al (s)+ 3O2 (g)→ 2Al2O3 (s) The maximum amount of Al2O3 that can be produced from 5.0 g of Al and 5.0 g of O2 is ________ g.

How many grams of phenol (C6H5OH)are contained in 5.50 mol of phenol?

A 1.038 g sample of unknown containing C,H,and O yielded 2.48 g of CO2 and 0.510 g of H2O during combustion analysis.Determine the empirical formula of the compound.

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 83.1%. This means that in this experiment,a 4.50 g sample of fluorine yields ________ g of SF6 .

1 mole of which of the following will contain the largest number of atoms?

One mole of ________ contains the smallest number of atoms.

Introduction: Matter, energy, and Measurement

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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

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Properties of Solutions

Chemical Kinetics

Chemical Equilibrium

Acid-Base Equilibria

Additional Aspects of Aqueous Equilibria

Chemistry of the Environment

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Chemistry of the Nonmetals

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Lithium and nitrogen react to produce lithium nitride: 6Li (s)+ N₂ (g)→ 2Li₃N (s) How many moles of N₂are needed to react with 0.550 mol of lithium?

How many moles of lithium phosphate (Li₃PO₄)are contained in 66.6 g of lithium phosphate?

There are ________ hydrogen atoms in 25 molecules of C₄H₄S₂.

When the following equation is balanced,the coefficient of H₂SO₄ is ________. H₂SO₄(aq)+ NaOH (aq)→ Na₂SO₄(aq)+ H₂O (l)

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?

Calcium carbide (CaC₂)reacts with water to produce acetylene (C₂H₂)as shown in the unbalanced reaction below: CaC₂ (s)+ H₂O (g)→ Ca(OH)₂ (s)+ C₂H₂ (g) How many grams of H₂O are required to completely react with 82.4 g of CaC₂.

There are ________ mol of carbon atoms in 5 mol of dimethylsulfoxide (C₂H₆SO).

Which of the following are decomposition reactions? 1. CH₄ (g) + O₂ (g) $\rightarrow$ CO₂ (g) + H₂O (l) 2. CaO (s) + CO₂(g) $\rightarrow$ CaCO₃ (s) 3. Mg (s) + O₂(g) $\rightarrow$ MgO (s) 4. PbCO₃ (s) $\rightarrow$ PbO (s) + CO₂ (g)

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

There are ________ oxygen atoms in 30 molecules of C₂₀H₄₂S₃O₂.

Balance the following reaction and determine the coefficient of H₂O. CO (g)+ H₂(g)→ H₂O (g)+ CH₄(g)

Lead (II)carbonate decomposes to give lead (II)oxide and carbon dioxide: PbCO₃ (s)→ PbO (s)+ CO₂(g) How many grams of lead (II)oxide will be produced by the decomposition of 2.50 g of lead (II)carbonate?

Solid aluminum and gaseous oxygen react in a combination reaction to produce aluminum oxide: 4Al (s)+ 3O₂ (g)→ 2Al₂O₃ (s) The maximum amount of Al₂O₃ that can be produced from 5.0 g of Al and 5.0 g of O₂is ________ g.

How many grams of phenol (C₆H₅OH)are contained in 5.50 mol of phenol?

A 1.038 g sample of unknown containing C,H,and O yielded 2.48 g of CO₂ and 0.510 g of H₂O during combustion analysis.Determine the empirical formula of the compound.

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 83.1%. This means that in this experiment,a 4.50 g sample of fluorine yields ________ g of SF_{6 .}