Given the following reactions: Fe + Br2 → FeBr2 3 FeBr2 + Br2 → Fe3Br8 If each reaction is 82.0% efficient,what mass of iron is necessary to make 8.45 g of Fe3Br8?

A) 0.870 g B) 3.73 g C) 2.14 g D) 1.75 g E) 2.61 g A) 0.870 g B) 3.73 g C) 2.14 g D) 1.75 g E) 2.61 g

For the reaction And 7.2 g of Fe2O3 (159.8 g/mol)produce 5.03 g of Fe (55.9 g/mol).Calculate the extent of reaction ,x.

A) 0.362 B) 0.089 C) 0.045 D) 0.092 E) 0.405 A) 0.362 B) 0.089 C) 0.045 D) 0.092 E) 0.405

How many moles of H3PO4 are produced when 20.0 g of HCl are produced by the reaction

A) (20.0/36.5)g B) (20.0/35.5)/5 g C) (20.0/36.5)/5 g D) (20.0/98.0)g E) (20.0/98.0)/5 g A) (20.0/36.5)g B) (20.0/35.5)/5 g C) (20.0/36.5)/5 g D) (20.0/98.0)g E) (20.0/98.0)/5 g

For the reaction And 7.2 g of Fe2O3 (159.8 g/mol)produce how many g of Fe (55.9 g/mol)?

A) 2.5 (55.9/27.0)g B) 2.5 (55.9)(2)/(27.0)(2)g C) 7.2 (55.9)(2)/159.8 g D) 7.2 (55.9/159.8)g E) 2.5 (55.9/159.8)g A) 2.5 (55.9/27.0)g B) 2.5 (55.9)(2)/(27.0)(2)g C) 7.2 (55.9)(2)/159.8 g D) 7.2 (55.9/159.8)g E) 2.5 (55.9/159.8)g

What is the percent yield if 185 grams of SiO2 are made from 328 g of Cr2O3 by the following equation? 3 Si(s)+ 2 Cr2O3(s)→ 3 SiO2(s)+ 4 Cr(l)

A) 142% B) 70% C) 56% D) 105% E) 95% A) 142% B) 70% C) 56% D) 105% E) 95%

If 8.52 g each of zinc,potassium dichromate,and sulfuric acid are reacted by the reaction: 4 Zn + K2Cr2O7 + 7 H2SO4→ 4 ZnSO4 + 2 CrSO4 +K2SO4 + 7 H2O How many grams of zinc will be left unreacted?

A) 0.94 g B) 3.65 g C) 5.27 g D) 1.89 g E) 3.25 g A) 0.94 g B) 3.65 g C) 5.27 g D) 1.89 g E) 3.25 g

Given the reaction: How many moles of K2SO4 are produced by allowing five moles each of KMnO4,KI,and H2SO4 to react?

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

Given the following reactions: Fe + Br2 → FeBr2 3 FeBr2 + Br2 → Fe3Br8 If each reaction is 82.0% efficient,what mass of Fe3Br8 is produced from 1.00 g Fe?

A) 4.81 g B) 3.94 g C) 2.65 g D) 3.24 g E) 2.57 g A) 4.81 g B) 3.94 g C) 2.65 g D) 3.24 g E) 2.57 g

Cryolite is a compound needed for the Hall-Heroult process for producing aluminum.Cryolite is produced by the following reaction: 6 HF + Al(OH)3 + 3 NaOH → Na3AlF6 + 6 H2O How many grams of cryolite are produced if the reaction has a 94.3% yield and a limiting reagent of 27.8 grams of HF?

A) 275 g B) 48.6 g C) 45.9 g D) 15.0 g E) 15.9 g A) 275 g B) 48.6 g C) 45.9 g D) 15.0 g E) 15.9 g

Exam 4: Chemical Reactions

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Given the following reactions: Fe + Br₂ → FeBr₂ 3 FeBr₂ + Br₂ → Fe₃Br₈ If each reaction is 82.0% efficient,what mass of iron is necessary to make 8.45 g of Fe₃Br₈?

(Multiple Choice)

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Question 41

For the reaction And 7.2 g of Fe₂O₃ (159.8 g/mol)produce 5.03 g of Fe (55.9 g/mol).Calculate the extent of reaction ,x.

(Multiple Choice)

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Question 42

How many moles of H₃PO₄ are produced when 20.0 g of HCl are produced by the reaction

(Multiple Choice)

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Question 43

What is the concentration (M)of sodium ions in 4.57 L of a 0.398 mol L^-1 P(aq)solution?

(Short Answer)

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Question 44

What is the molarity of 10.9 g KCl dissolved in 150.0 mL of water?

(Multiple Choice)

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Question 45

Which of the following represents a 1.00 M aqueous solution of glucose (C₆H₁₂O₆)?

(Multiple Choice)

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Question 46

For the reaction And 7.2 g of Fe₂O₃ (159.8 g/mol)produce how many g of Fe (55.9 g/mol)?

(Multiple Choice)

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Question 47

7.0 g of nitrogen is reacted with 5.0 g of hydrogen to produce ammonia according to the chemical equation shown below.Which one of the following statements is FALSE? N₂(g)+ 3 H₂(g)→ 2 NH₃(g)

(Multiple Choice)

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Question 48

What is the percent yield if 185 grams of SiO₂ are made from 328 g of Cr₂O₃ by the following equation? 3 Si(s)+ 2 Cr₂O₃(s)→ 3 SiO₂(s)+ 4 Cr(l)

(Multiple Choice)

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Question 49

Aluminum metal reacts with aqueous iron(II)chloride to form aqueous aluminum chloride and iron metal.What is the stoichiometric coefficient for aluminum when the chemical equation is balanced using the lowest,whole-number stoichiometric coefficients?

(Multiple Choice)

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Question 50

If 8.52 g each of zinc,potassium dichromate,and sulfuric acid are reacted by the reaction: 4 Zn + K₂Cr₂O₇ + 7 H₂SO₄→ 4 ZnSO₄ + 2 CrSO₄ +K₂SO₄ + 7 H₂O How many grams of zinc will be left unreacted?

(Multiple Choice)

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Question 51

Given the reaction: How many moles of K₂SO₄ are produced by allowing five moles each of KMnO₄,KI,and H₂SO₄ to react?

(Multiple Choice)

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Question 52

What is the oxidation number change for the manganese atom in the following unbalanced reduction half-reaction: MnO₄^-(aq)+ H⁺(aq)→ Mn²⁺(aq)+ H₂O(l)

(Multiple Choice)

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Question 53

Which metal will produce the most hydrogen per gram of metal?

(Multiple Choice)

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Question 54

Given the following reactions: Fe + Br₂ → FeBr₂ 3 FeBr₂ + Br₂ → Fe₃Br₈ If each reaction is 82.0% efficient,what mass of Fe₃Br₈ is produced from 1.00 g Fe?

(Multiple Choice)

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Question 55

Cryolite is a compound needed for the Hall-Heroult process for producing aluminum.Cryolite is produced by the following reaction: 6 HF + Al(OH)₃ + 3 NaOH → Na₃AlF₆ + 6 H₂O How many grams of cryolite are produced if the reaction has a 94.3% yield and a limiting reagent of 27.8 grams of HF?

(Multiple Choice)

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Question 56

If 85.6 mL of a 6.75 M solution are diluted to 6.20 L with water,what is the concentration of the final solution?

(Multiple Choice)

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Question 57

In a solution of alcohol and water that is 70% water,alcohol is the solvent.

(True/False)

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Question 58

What mass of trisodium phosphate is required to prepare 250.0 mL of a solution that is In sodium ion?

(Multiple Choice)

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Question 59

How many moles of BCl₃ are needed to produce 10.0 g of HCl(aq)in the following reaction? BCl₃(g)+ 3 H₂O(l)→ 3 HCl(aq)+ B(OH)₃(aq)

(Multiple Choice)

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Question 60

Showing 41 - 60 of 170

Exam 4: Chemical Reactions

Given the following reactions: Fe + Br2 → FeBr2 3 FeBr2 + Br2 → Fe3Br8 If each reaction is 82.0% efficient,what mass of iron is necessary to make 8.45 g of Fe3Br8?

For the reaction And 7.2 g of Fe2O3 (159.8 g/mol)produce 5.03 g of Fe (55.9 g/mol).Calculate the extent of reaction ,x.

How many moles of H3PO4 are produced when 20.0 g of HCl are produced by the reaction

What is the concentration (M)of sodium ions in 4.57 L of a 0.398 mol L-1 P(aq)solution?

What is the molarity of 10.9 g KCl dissolved in 150.0 mL of water?

Which of the following represents a 1.00 M aqueous solution of glucose (C6H12O6)?

For the reaction And 7.2 g of Fe2O3 (159.8 g/mol)produce how many g of Fe (55.9 g/mol)?

7.0 g of nitrogen is reacted with 5.0 g of hydrogen to produce ammonia according to the chemical equation shown below.Which one of the following statements is FALSE? N2(g)+ 3 H2(g)→ 2 NH3(g)

What is the percent yield if 185 grams of SiO2 are made from 328 g of Cr2O3 by the following equation? 3 Si(s)+ 2 Cr2O3(s)→ 3 SiO2(s)+ 4 Cr(l)

Aluminum metal reacts with aqueous iron(II)chloride to form aqueous aluminum chloride and iron metal.What is the stoichiometric coefficient for aluminum when the chemical equation is balanced using the lowest,whole-number stoichiometric coefficients?

If 8.52 g each of zinc,potassium dichromate,and sulfuric acid are reacted by the reaction: 4 Zn + K2Cr2O7 + 7 H2SO4→ 4 ZnSO4 + 2 CrSO4 +K2SO4 + 7 H2O How many grams of zinc will be left unreacted?

Given the reaction: How many moles of K2SO4 are produced by allowing five moles each of KMnO4,KI,and H2SO4 to react?

What is the oxidation number change for the manganese atom in the following unbalanced reduction half-reaction: Mn O4- (aq)+ H+(aq)→ Mn2+(aq)+ H2O(l)

Which metal will produce the most hydrogen per gram of metal?

Given the following reactions: Fe + Br2 → FeBr2 3 FeBr2 + Br2 → Fe3Br8 If each reaction is 82.0% efficient,what mass of Fe3Br8 is produced from 1.00 g Fe?

Cryolite is a compound needed for the Hall-Heroult process for producing aluminum.Cryolite is produced by the following reaction: 6 HF + Al(OH)3 + 3 NaOH → Na3AlF6 + 6 H2O How many grams of cryolite are produced if the reaction has a 94.3% yield and a limiting reagent of 27.8 grams of HF?

If 85.6 mL of a 6.75 M solution are diluted to 6.20 L with water,what is the concentration of the final solution?

In a solution of alcohol and water that is 70% water,alcohol is the solvent.

What mass of trisodium phosphate is required to prepare 250.0 mL of a solution that is In sodium ion?

How many moles of BCl3 are needed to produce 10.0 g of HCl(aq)in the following reaction? BCl3(g)+ 3 H2O(l)→ 3 HCl(aq)+ B(OH)3(aq)

Matter: Its Properties and Measurement

Atoms and the Atomic Theory

Chemical Compounds

Introduction to Reactions in Aqueous Solutions

Gases

Thermochemistry

Electrons in Atoms

The Periodic Table and Some Atomic Properties

Chemical Bonding I: Basic Concepts

Chemical Bonding Ii: Valence Bond and Molecular Orbital Theories

Intermolecular Forces: Liquids and Solids

Spontaneous Change: Entropy and Gibbs Energy

Solutions and Their Physical Properties

Principles of Chemical Equilibrium

Acids and Bases

Additional Aspects of Acidbase Equilibria

Solubility and Complex-Ion Equilibria

Electrochemistry

Chemical Kinetics

Chemistry of the Main-Group Elements I: Groups 1,2,13,and 14

Chemistry of the Main-Group Elements Ii: Groups 18,17,16,15,and Hydrogen

The Transition Elements

Complex Ions and Coordination Compounds

Nuclear Chemistry

Structures of Organic Compounds

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Given the following reactions: Fe + Br₂ → FeBr₂ 3 FeBr₂ + Br₂ → Fe₃Br₈ If each reaction is 82.0% efficient,what mass of iron is necessary to make 8.45 g of Fe₃Br₈?

For the reaction And 7.2 g of Fe₂O₃ (159.8 g/mol)produce 5.03 g of Fe (55.9 g/mol).Calculate the extent of reaction ,x.

How many moles of H₃PO₄ are produced when 20.0 g of HCl are produced by the reaction

What is the concentration (M)of sodium ions in 4.57 L of a 0.398 mol L^-1 P(aq)solution?

Which of the following represents a 1.00 M aqueous solution of glucose (C₆H₁₂O₆)?

For the reaction And 7.2 g of Fe₂O₃ (159.8 g/mol)produce how many g of Fe (55.9 g/mol)?

7.0 g of nitrogen is reacted with 5.0 g of hydrogen to produce ammonia according to the chemical equation shown below.Which one of the following statements is FALSE? N₂(g)+ 3 H₂(g)→ 2 NH₃(g)

What is the percent yield if 185 grams of SiO₂ are made from 328 g of Cr₂O₃ by the following equation? 3 Si(s)+ 2 Cr₂O₃(s)→ 3 SiO₂(s)+ 4 Cr(l)

If 8.52 g each of zinc,potassium dichromate,and sulfuric acid are reacted by the reaction: 4 Zn + K₂Cr₂O₇ + 7 H₂SO₄→ 4 ZnSO₄ + 2 CrSO₄ +K₂SO₄ + 7 H₂O How many grams of zinc will be left unreacted?

Given the reaction: How many moles of K₂SO₄ are produced by allowing five moles each of KMnO₄,KI,and H₂SO₄ to react?

What is the oxidation number change for the manganese atom in the following unbalanced reduction half-reaction: MnO₄^-(aq)+ H⁺(aq)→ Mn²⁺(aq)+ H₂O(l)

Given the following reactions: Fe + Br₂ → FeBr₂ 3 FeBr₂ + Br₂ → Fe₃Br₈ If each reaction is 82.0% efficient,what mass of Fe₃Br₈ is produced from 1.00 g Fe?

Cryolite is a compound needed for the Hall-Heroult process for producing aluminum.Cryolite is produced by the following reaction: 6 HF + Al(OH)₃ + 3 NaOH → Na₃AlF₆ + 6 H₂O How many grams of cryolite are produced if the reaction has a 94.3% yield and a limiting reagent of 27.8 grams of HF?

How many moles of BCl₃ are needed to produce 10.0 g of HCl(aq)in the following reaction? BCl₃(g)+ 3 H₂O(l)→ 3 HCl(aq)+ B(OH)₃(aq)