When a solution of Cu(II) chloride, CuCl2 , is added to a solution of potassium sulfide, K2S, a black precipitate of copper sulfide, CuS, forms. Which of the following is the molecular equation for this reaction?

A) CuCl2(aq) + K2S(aq) → CuS(s) + 2 KCl(aq) B) Cu2+(aq) + Cl22-(aq) + K22+(aq) + S2-(aq) → CuS(s) + K22+(aq) + Cl22-(aq) C) Cu2+(aq) + 2 Cl-(aq) + 2 K+(aq) + S2-(aq) → CuS(s) + 2 K+(aq) + 2 Cl- (aq) D) Cu2+(aq) + S2-(aq) → CuS(s) A) CuCl2(aq) + K2S(aq) → CuS(s) + 2 KCl(aq) B) Cu2+(aq) + Cl22-(aq) + K22+(aq) + S2-(aq) → CuS(s) + K22+(aq) + Cl22-(aq) C) Cu2+(aq) + 2 Cl-(aq) + 2 K+(aq) + S2-(aq) → CuS(s) + 2 K+(aq) + 2 Cl- (aq) D) Cu2+(aq) + S2-(aq) → CuS(s)

Lime, CaO, is produced by the reaction CaCO3(s) → CaO(s) + CO2(g). What weight of CO2 is obtained by the decomposition of 38.7 g of CaCO3?

A) 15.5 g B) 17.0 g C) 21.7 g D) 23.2 g A) 15.5 g B) 17.0 g C) 21.7 g D) 23.2 g

Ethanol is produced industrially by the acid catalyzed reaction of ethylene with water. The balanced equation for this reaction is: C2H4(g) + H2O(g) → C2H5OH(l) If water is present in excess, how many grams of ethanol can be produced from 42.7 g of ethylene?

A) 42.7 g B) 46.1 g C) 70.1 g D) 92.2 g A) 42.7 g B) 46.1 g C) 70.1 g D) 92.2 g

The balanced equation for burning octane is: 2 C8H18(g) + 25 O2(g) → 18 H2O(g) + 16 CO2(g). What weight of oxygen is required to completely burn 19.8 g of octane?

A) 28.1 g B) 34.7 C) 69.5 D) 139 g A) 28.1 g B) 34.7 C) 69.5 D) 139 g

A serving of a particular fruit dessert contains 20.0 g of sugar. If all the sugar is sucrose, C12H22O11, how many molecules of sugar are present in this serving?

A) 0.0584 B) 17.1 C) 3.52 × 1022 D) 1.03 × 1025 A) 0.0584 B) 17.1 C) 3.52 × 1022 D) 1.03 × 1025

How many oxygen atoms are present in 5.20 mol of Al2(SO4)3?

A) 62.4 B) 3.76 × 1025 C) 9.39 × 1024 D) 3.13 × 1024 A) 62.4 B) 3.76 × 1025 C) 9.39 × 1024 D) 3.13 × 1024

When solutions of AgNO3 and NaCl react, the balanced molecular equation is: AgNO3(aq) + NaCl(aq) → AgCl(s) + NaNO3(aq) How much AgCl is produced when 3.10 g of AgNO3 and 0.600 g of NaCl react?

A) 1.47 g B) 2.23 g C) 2.62 g D) 3.70 g A) 1.47 g B) 2.23 g C) 2.62 g D) 3.70 g

Exam 4: Chemical Reactions

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When a solution of Cu(II) chloride, CuCl₂ , is added to a solution of potassium sulfide, K₂S, a black precipitate of copper sulfide, CuS, forms. Which of the following is the molecular equation for this reaction?

(Multiple Choice)

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Question 61

A typical deposit of cholesterol, C₂₇H₄₆O, in an artery has a mass of 3.90 mg. How many molecules of cholesterol are present in this deposit?

(Multiple Choice)

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Question 62

The reaction of nitric acid, HNO₃(aq), with calcium carbonate, CaCO₃(s) produces calcium nitrate, carbon dioxide, and water. Which of the following is the correct balanced equation for this reaction?

(Multiple Choice)

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Question 63

Lime, CaO, is produced by the reaction CaCO₃(s) → CaO(s) + CO₂(g). What weight of CO₂ is obtained by the decomposition of 38.7 g of CaCO₃?

(Multiple Choice)

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Question 64

In an experiment to prepare aspirin, the percent yield was 94.3% G) If the actual yield was 124.3 g, what was the theoretical yield for this experiment?

(Multiple Choice)

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Question 65

Given the reaction 2 HgO(s) → 2 Hg(l) + O₂(g). What weight of elemental mercury will be obtained by the decomposition of 94.5 g of HgO?

(Multiple Choice)

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Question 66

Which of the following compounds has the largest formula weight?

(Multiple Choice)

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Question 67

Ethanol is produced industrially by the acid catalyzed reaction of ethylene with water. The balanced equation for this reaction is: C₂H₄(g) + H₂O(g) → C₂H₅OH(l) If water is present in excess, how many grams of ethanol can be produced from 42.7 g of ethylene?

(Multiple Choice)

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Question 68

The balanced equation for burning octane is: 2 C₈H₁₈(g) + 25 O₂(g) → 18 H₂O(g) + 16 CO₂(g). What weight of oxygen is required to completely burn 19.8 g of octane?

(Multiple Choice)

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Question 69

In the industrial synthesis of acetic acid, methanol is reacted with carbon monoxide. The balanced equation for this reaction is: CH₃OH(g) + CO(g) → CH₃COOH(l) How many grams of CO(g) are required to produce 16.6 mol of acetic acid?

(Multiple Choice)

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Question 70

Which of the following is true of a voltaic cell?

(Multiple Choice)

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Question 71

Which of the following compounds is insoluble in water?

(Multiple Choice)

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Question 72

Which of the following sulfides is soluble in water?

(Multiple Choice)

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Question 73

Which of the following is true of all combustion reactions?

(Multiple Choice)

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Question 74

Which of the following definitions of oxidation is generally most useful when dealing with ionic materials?

(Multiple Choice)

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Question 75

The term formula weight can be used with respect to which of the following?

(Multiple Choice)

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Question 76

A serving of a particular fruit dessert contains 20.0 g of sugar. If all the sugar is sucrose, C₁₂H₂₂O₁₁, how many molecules of sugar are present in this serving?

(Multiple Choice)

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Question 77

How many oxygen atoms are present in 5.20 mol of Al₂(SO₄)₃?

(Multiple Choice)

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Question 78

Examine the reaction taking place in the beaker in the image. -Which of the following might be the product forming in the beaker?

(Multiple Choice)

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Question 79

When solutions of AgNO₃ and NaCl react, the balanced molecular equation is: AgNO₃(aq) + NaCl(aq) → AgCl(s) + NaNO₃(aq) How much AgCl is produced when 3.10 g of AgNO₃ and 0.600 g of NaCl react?

(Multiple Choice)

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Question 80

Showing 61 - 80 of 140

Exam 4: Chemical Reactions

When a solution of Cu(II) chloride, CuCl2 , is added to a solution of potassium sulfide, K2S, a black precipitate of copper sulfide, CuS, forms. Which of the following is the molecular equation for this reaction?

A typical deposit of cholesterol, C27H46O, in an artery has a mass of 3.90 mg. How many molecules of cholesterol are present in this deposit?

The reaction of nitric acid, HNO3(aq), with calcium carbonate, CaCO3(s) produces calcium nitrate, carbon dioxide, and water. Which of the following is the correct balanced equation for this reaction?

Lime, CaO, is produced by the reaction CaCO3(s) → CaO(s) + CO2(g). What weight of CO2 is obtained by the decomposition of 38.7 g of CaCO3?

In an experiment to prepare aspirin, the percent yield was 94.3% G) If the actual yield was 124.3 g, what was the theoretical yield for this experiment?

Given the reaction 2 HgO(s) → 2 Hg(l) + O2(g). What weight of elemental mercury will be obtained by the decomposition of 94.5 g of HgO?

Which of the following compounds has the largest formula weight?

Ethanol is produced industrially by the acid catalyzed reaction of ethylene with water. The balanced equation for this reaction is: C2H4(g) + H2O(g) → C2H5OH(l) If water is present in excess, how many grams of ethanol can be produced from 42.7 g of ethylene?

The balanced equation for burning octane is: 2 C8H18(g) + 25 O2(g) → 18 H2O(g) + 16 CO2(g). What weight of oxygen is required to completely burn 19.8 g of octane?

In the industrial synthesis of acetic acid, methanol is reacted with carbon monoxide. The balanced equation for this reaction is: CH3OH(g) + CO(g) → CH3COOH(l) How many grams of CO(g) are required to produce 16.6 mol of acetic acid?

Which of the following is true of a voltaic cell?

Which of the following compounds is insoluble in water?

Which of the following sulfides is soluble in water?

Which of the following is true of all combustion reactions?

Which of the following definitions of oxidation is generally most useful when dealing with ionic materials?

The term formula weight can be used with respect to which of the following?

A serving of a particular fruit dessert contains 20.0 g of sugar. If all the sugar is sucrose, C12H22O11, how many molecules of sugar are present in this serving?

How many oxygen atoms are present in 5.20 mol of Al2(SO4)3?

Examine the reaction taking place in the beaker in the image. -Which of the following might be the product forming in the beaker?

When solutions of AgNO3 and NaCl react, the balanced molecular equation is: AgNO3(aq) + NaCl(aq) → AgCl(s) + NaNO3(aq) How much AgCl is produced when 3.10 g of AgNO3 and 0.600 g of NaCl react?

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When a solution of Cu(II) chloride, CuCl₂ , is added to a solution of potassium sulfide, K₂S, a black precipitate of copper sulfide, CuS, forms. Which of the following is the molecular equation for this reaction?

A typical deposit of cholesterol, C₂₇H₄₆O, in an artery has a mass of 3.90 mg. How many molecules of cholesterol are present in this deposit?

The reaction of nitric acid, HNO₃(aq), with calcium carbonate, CaCO₃(s) produces calcium nitrate, carbon dioxide, and water. Which of the following is the correct balanced equation for this reaction?

Lime, CaO, is produced by the reaction CaCO₃(s) → CaO(s) + CO₂(g). What weight of CO₂ is obtained by the decomposition of 38.7 g of CaCO₃?

Given the reaction 2 HgO(s) → 2 Hg(l) + O₂(g). What weight of elemental mercury will be obtained by the decomposition of 94.5 g of HgO?

Ethanol is produced industrially by the acid catalyzed reaction of ethylene with water. The balanced equation for this reaction is: C₂H₄(g) + H₂O(g) → C₂H₅OH(l) If water is present in excess, how many grams of ethanol can be produced from 42.7 g of ethylene?

The balanced equation for burning octane is: 2 C₈H₁₈(g) + 25 O₂(g) → 18 H₂O(g) + 16 CO₂(g). What weight of oxygen is required to completely burn 19.8 g of octane?

In the industrial synthesis of acetic acid, methanol is reacted with carbon monoxide. The balanced equation for this reaction is: CH₃OH(g) + CO(g) → CH₃COOH(l) How many grams of CO(g) are required to produce 16.6 mol of acetic acid?

A serving of a particular fruit dessert contains 20.0 g of sugar. If all the sugar is sucrose, C₁₂H₂₂O₁₁, how many molecules of sugar are present in this serving?

How many oxygen atoms are present in 5.20 mol of Al₂(SO₄)₃?

When solutions of AgNO₃ and NaCl react, the balanced molecular equation is: AgNO₃(aq) + NaCl(aq) → AgCl(s) + NaNO₃(aq) How much AgCl is produced when 3.10 g of AgNO₃ and 0.600 g of NaCl react?