If the percent yield for the following reaction is 65.0%,how many grams of KClO3 are needed to produce 42.0 g of O2? 2 KClO3(s)→ 2 KCl(s)+ 3 O2(g)

A) 69.7 g B) 107 g C) 165 g D) 371 g A) 69.7 g B) 107 g C) 165 g D) 371 g

How many moles of CuO can be produced from 1.80 mol of Cu2O in the following reaction? 2 Cu2O(s)+ O2(g)→ 4 CuO(s)

A) 0.900 mol B) 1.80 mol C) 3.60 mol D) 7.20 mol A) 0.900 mol B) 1.80 mol C) 3.60 mol D) 7.20 mol

Hydrazine,N2H4,once used as a rocket propellant,reacts with oxygen in the following equation. N2H4(g)+ O2(g)→ N2(g)+ 2 H2O(g) The reaction,at 50% yield,produces 4.0 moles of N2.What was the mass of hydrazine used? Assume that O2 is in excess.

A) 32.0 g B) 260 g C) 64 g D) 0.063 g A) 32.0 g B) 260 g C) 64 g D) 0.063 g

What mass of sulfur hexafluoride,SF6,has the same number of fluorine atoms as 50.0 g of oxygen difluoride,OF2?

A) 202.7 g B) 8.33 g C) 43.0 g D) 135.1 g A) 202.7 g B) 8.33 g C) 43.0 g D) 135.1 g

What mass of sulfur hexafluoride,SF6,has the same number of fluorine atoms as 25.0 g of oxygen difluoride,OF2?

A) 0.901 g B) 8.33 g C) 22.5 g D) 203 g A) 0.901 g B) 8.33 g C) 22.5 g D) 203 g

What is the molar mass of pentane if 4.18 × 1016 molecules of pentane weigh 5.00 μg?

A) 72.0 g/mol B) 139 g/mol C) 288 g/mol D) 347 g/mol A) 72.0 g/mol B) 139 g/mol C) 288 g/mol D) 347 g/mol

The following diagrams represent the reaction of A2 (shaded spheres)with B2 (unshaded spheres).Identify the limiting reactant and write a balanced equation for the reaction.

A) A2 is the limiting reactant;A + 4 B → AB4. B) A2 is the limiting reactant;A2 + 4 B2 → 2 AB4. C) B2 is the limiting reactant;A + 4 B → AB4. D) B2 is the limiting reactant;A2 + 4 B2 → 2 AB4. A) A2 is the limiting reactant;A + 4 B → AB4. B) A2 is the limiting reactant;A2 + 4 B2 → 2 AB4. C) B2 is the limiting reactant;A + 4 B → AB4. D) B2 is the limiting reactant;A2 + 4 B2 → 2 AB4.

Exam 3: Mass Relationships in Chemical Reactions

If the percent yield for the following reaction is 65.0%,how many grams of KClO₃ are needed to produce 42.0 g of O₂? 2 KClO₃(s)→ 2 KCl(s)+ 3 O₂(g)

(Multiple Choice)

4.7/5

(45)

Question 61

Which of the following has the greatest mass?

(Multiple Choice)

4.9/5

(28)

Question 62

How many moles of CuO can be produced from 1.80 mol of Cu₂O in the following reaction? 2 Cu₂O(s)+ O₂(g)→ 4 CuO(s)

(Multiple Choice)

4.9/5

(37)

Question 63

What is the balanced chemical equation for the reaction of element A (unshaded spheres)with element B (shaded spheres)as represented below?

(Multiple Choice)

5.0/5

(40)

Question 64

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

(Multiple Choice)

4.8/5

(34)

Question 65

To the nearest whole number,the molar mass of Cu(NO₃)₂ is ________ g/mol.

(Short Answer)

4.9/5

(41)

Question 66

What is the balanced chemical equation for the reaction of element A (unshaded spheres)with element B (shaded spheres)as represented below?

(Multiple Choice)

4.8/5

(41)

Question 67

Hydrazine,N₂H₄,once used as a rocket propellant,reacts with oxygen in the following equation. N₂H₄(g)+ O₂(g)→ N₂(g)+ 2 H₂O(g) The reaction,at 50% yield,produces 4.0 moles of N₂.What was the mass of hydrazine used? Assume that O₂ is in excess.

(Multiple Choice)

4.8/5

(25)

Question 68

What is the mass of a single astatine molecule,At₂?

(Multiple Choice)

4.8/5

(37)

Question 69

Tablets of ascorbic acid,or Vitamin C,C₆H₈O₆,are taken as a dietary supplement.If a typical tablet contains 500 mg,how many molecules of Vitamin C are in a tablet?

(Multiple Choice)

4.9/5

(32)

Question 70

What is the balanced chemical equation for the reaction of element A (unshaded spheres)with element B (shaded spheres)as represented below?

(Multiple Choice)

4.8/5

(31)

Question 71

What mass of sulfur hexafluoride,SF₆,has the same number of fluorine atoms as 50.0 g of oxygen difluoride,OF₂?

(Multiple Choice)

4.8/5

(33)

Question 72

What is the empirical formula for perfluoropropane if the compound contains 81% fluorine and 19% carbon by mass?

(Multiple Choice)

4.9/5

(39)

Question 73

Which substance is the limiting reactant when 16.0 g of sulfur reacts with 10.0 g of oxygen and 12.0 g of sodium hydroxide according to the following chemical equation? 2 S(s)+ 3 O₂(g)+ 4 NaOH(aq)→ 2 Na₂SO₄(aq)+ 2 H₂O(l)

(Multiple Choice)

4.9/5

(33)

Question 74

Which of the following has the greatest mass?

(Multiple Choice)

4.9/5

(48)

Question 75

What mass of sulfur hexafluoride,SF₆,has the same number of fluorine atoms as 25.0 g of oxygen difluoride,OF₂?

(Multiple Choice)

4.7/5

(31)

Question 76

When iron(III)oxide reacts with hydrochloric acid,iron(III)chloride and water are formed.How many grams of iron(III)chloride are formed from 10.0 g of iron(III)oxide and 10.0 g of hydrochloric acid?

(Multiple Choice)

4.9/5

(35)

Question 77

What is the molar mass of pentane if 4.18 × 10¹⁶ molecules of pentane weigh 5.00 μg?

(Multiple Choice)

4.9/5

(36)

Question 78

3.0 moles of nitrogen is reacted with 11.0 moles 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)

4.8/5

(48)

Question 79

The following diagrams represent the reaction of A₂ (shaded spheres)with B₂ (unshaded spheres).Identify the limiting reactant and write a balanced equation for the reaction.

(Multiple Choice)

4.8/5

(28)

Question 80

Showing 61 - 80 of 159

Exam 3: Mass Relationships in Chemical Reactions

If the percent yield for the following reaction is 65.0%,how many grams of KClO3 are needed to produce 42.0 g of O2? 2 KClO3(s)→ 2 KCl(s)+ 3 O2(g)

Which of the following has the greatest mass?

How many moles of CuO can be produced from 1.80 mol of Cu2O in the following reaction? 2 Cu2O(s)+ O2(g)→ 4 CuO(s)

What is the balanced chemical equation for the reaction of element A (unshaded spheres)with element B (shaded spheres)as represented below?

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

To the nearest whole number,the molar mass of Cu(NO3)2 is ________ g/mol.

What is the balanced chemical equation for the reaction of element A (unshaded spheres)with element B (shaded spheres)as represented below?

Hydrazine,N2H4,once used as a rocket propellant,reacts with oxygen in the following equation. N2H4(g)+ O2(g)→ N2(g)+ 2 H2O(g) The reaction,at 50% yield,produces 4.0 moles of N2.What was the mass of hydrazine used? Assume that O2 is in excess.

What is the mass of a single astatine molecule,At2?

Tablets of ascorbic acid,or Vitamin C,C6H8O6,are taken as a dietary supplement.If a typical tablet contains 500 mg,how many molecules of Vitamin C are in a tablet?

What is the balanced chemical equation for the reaction of element A (unshaded spheres)with element B (shaded spheres)as represented below?

What mass of sulfur hexafluoride,SF6,has the same number of fluorine atoms as 50.0 g of oxygen difluoride,OF2?

What is the empirical formula for perfluoropropane if the compound contains 81% fluorine and 19% carbon by mass?

Which substance is the limiting reactant when 16.0 g of sulfur reacts with 10.0 g of oxygen and 12.0 g of sodium hydroxide according to the following chemical equation? 2 S(s)+ 3 O2(g)+ 4 NaOH(aq)→ 2 Na2SO4(aq)+ 2 H2O(l)

Which of the following has the greatest mass?

What mass of sulfur hexafluoride,SF6,has the same number of fluorine atoms as 25.0 g of oxygen difluoride,OF2?

When iron(III)oxide reacts with hydrochloric acid,iron(III)chloride and water are formed.How many grams of iron(III)chloride are formed from 10.0 g of iron(III)oxide and 10.0 g of hydrochloric acid?

What is the molar mass of pentane if 4.18 × 1016 molecules of pentane weigh 5.00 μg?

3.0 moles of nitrogen is reacted with 11.0 moles 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)

The following diagrams represent the reaction of A2 (shaded spheres)with B2 (unshaded spheres).Identify the limiting reactant and write a balanced equation for the reaction.

Chemical Tools: Experimentation and Measurement

Atoms, molecules, and Ions

Reactions in Aqueous Solutions

Periodicity and the Electronic Structure of Atoms

Ionic Compounds: Periodic Trends and Bonding

Covalent Bonding and Electron-Dot Structures

Covalent Compounds: Bonding Theories and Molecular Structure

Thermochemistry: Chemical Energy

Gases: Their Properties and Behavior

Liquids, solids, and Phase Changes

Solutions and Their Properties

Chemical Kinetics

Chemical Equilibrium

Aqueous Equilibria: Acids and Bases

Applications of Aqueous Equilibria

Thermodynamics: Entropy, free Energy, and Equilibrium

Electrochemistry

Nuclear Chemistry

Transition Elements and Coordination Chemistry

Metals and Solid-State Materials

The Main-Group Elements

Connections to Organic and Biological Chemistry

Filters

If the percent yield for the following reaction is 65.0%,how many grams of KClO₃ are needed to produce 42.0 g of O₂? 2 KClO₃(s)→ 2 KCl(s)+ 3 O₂(g)

How many moles of CuO can be produced from 1.80 mol of Cu₂O in the following reaction? 2 Cu₂O(s)+ O₂(g)→ 4 CuO(s)

To the nearest whole number,the molar mass of Cu(NO₃)₂ is ________ g/mol.

Hydrazine,N₂H₄,once used as a rocket propellant,reacts with oxygen in the following equation. N₂H₄(g)+ O₂(g)→ N₂(g)+ 2 H₂O(g) The reaction,at 50% yield,produces 4.0 moles of N₂.What was the mass of hydrazine used? Assume that O₂ is in excess.

What is the mass of a single astatine molecule,At₂?

Tablets of ascorbic acid,or Vitamin C,C₆H₈O₆,are taken as a dietary supplement.If a typical tablet contains 500 mg,how many molecules of Vitamin C are in a tablet?

What mass of sulfur hexafluoride,SF₆,has the same number of fluorine atoms as 50.0 g of oxygen difluoride,OF₂?

Which substance is the limiting reactant when 16.0 g of sulfur reacts with 10.0 g of oxygen and 12.0 g of sodium hydroxide according to the following chemical equation? 2 S(s)+ 3 O₂(g)+ 4 NaOH(aq)→ 2 Na₂SO₄(aq)+ 2 H₂O(l)

What mass of sulfur hexafluoride,SF₆,has the same number of fluorine atoms as 25.0 g of oxygen difluoride,OF₂?

What is the molar mass of pentane if 4.18 × 10¹⁶ molecules of pentane weigh 5.00 μg?

3.0 moles of nitrogen is reacted with 11.0 moles 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)

The following diagrams represent the reaction of A₂ (shaded spheres)with B₂ (unshaded spheres).Identify the limiting reactant and write a balanced equation for the reaction.