What is the percent yield of CuS for the following reaction given that you start with 15.5 g of Na2S and 12.1 g CuSO4? The actual amount of CuS produced was 3.05 g. Reaction: Na2S + CuSO4 → Na2SO4 + CuS

A) 16.1% B) 42.1% C) 18.93% D) 7.25% E) not enough information A) 16.1% B) 42.1% C) 18.93% D) 7.25% E) not enough information

A 24.0 g sample of nitrogen gas reacts with an excess of hydrogen gas to give an actual yield of 3.85 g NH3.What is the percent yield for this reaction? Reaction: N2(g)+ 3 H2(g)→ 2 NH3(g)

A) 86.8% B) 73.6% C) 26.4% D) 13.2% E) none of the above A) 86.8% B) 73.6% C) 26.4% D) 13.2% E) none of the above

How many moles of lithium nitrate are theoretically produced if we start with 3.4 moles of Ca(NO3)2 and 2.4 moles of Li3PO4? Reaction: 3Ca(NO3)2 + 2Li3PO4 → 6LiNO3 + Ca3(PO4)2

A) 7.2 B) 6.8 C) 1.2 D) 1.1 E) not enough information A) 7.2 B) 6.8 C) 1.2 D) 1.1 E) not enough information

Starting with 156 g Li2O and 33.3 g H2O,decide which reactant is present in limiting quantities. Given: Li2O + H2O → 2 LiOH

A) lithium oxide B) water C) lithium hydroxide D) insufficient data E) none of the above A) lithium oxide B) water C) lithium hydroxide D) insufficient data E) none of the above

Which is the limiting reactant in the following reaction given that you start with 15.5 g of Na2S and 12.1 g CuSO4? Reaction: Na2S + CuSO4 → Na2SO4 + CuS

A) Na2S B) CuSO4 C) Na2SO4 D) CuS E) not enough information A) Na2S B) CuSO4 C) Na2SO4 D) CuS E) not enough information

Exam 8: Quantities in Chemical Reactions

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What is the percent yield of CuS for the following reaction given that you start with 15.5 g of Na₂S and 12.1 g CuSO₄? The actual amount of CuS produced was 3.05 g. Reaction: Na₂S + CuSO₄→ Na₂SO₄ + CuS

(Multiple Choice)

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Question 101

A 24.0 g sample of nitrogen gas reacts with an excess of hydrogen gas to give an actual yield of 3.85 g NH₃.What is the percent yield for this reaction? Reaction: N₂(g)+ 3 H₂(g)→ 2 NH₃(g)

(Multiple Choice)

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Question 102

If it takes 2 cups of milk and 1 cup of cocoa mix to make three servings of hot chocolate,and you only have 1 cup of each,then you cannot make any hot chocolate.

(True/False)

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Question 103

Consider the following equation: CO + 2 H₂ → CH₃OH △H rxn = -128 kJ Calculate the amount of heat (in kJ)associated with complete reaction of 8.08 g H₂.

(Multiple Choice)

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Question 104

If the theoretical yield of the reaction below corresponds to 25.3 g and the percent yield of the reaction is known to be reproducibly 81.1%,calculate the actual yield. Given: Li₂O + H₂O → 2 LiOH

(Multiple Choice)

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Question 105

How many moles of lithium nitrate are theoretically produced if we start with 3.4 moles of Ca(NO₃)₂ and 2.4 moles of Li₃PO₄? Reaction: 3Ca(NO₃)₂+ 2Li₃PO₄→ 6LiNO₃ + Ca₃(PO₄)₂

(Multiple Choice)

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Question 106

Starting with 156 g Li₂O and 33.3 g H₂O,decide which reactant is present in limiting quantities. Given: Li₂O + H₂O → 2 LiOH

(Multiple Choice)

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Question 107

Which is the limiting reactant in the following reaction given that you start with 15.5 g of Na₂S and 12.1 g CuSO₄? Reaction: Na₂S + CuSO₄→ Na₂SO₄ + CuS

(Multiple Choice)

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Question 108

Showing 101 - 108 of 108

What is the percent yield of CuS for the following reaction given that you start with 15.5 g of Na₂S and 12.1 g CuSO₄? The actual amount of CuS produced was 3.05 g. Reaction: Na₂S + CuSO₄→ Na₂SO₄ + CuS

A 24.0 g sample of nitrogen gas reacts with an excess of hydrogen gas to give an actual yield of 3.85 g NH₃.What is the percent yield for this reaction? Reaction: N₂(g)+ 3 H₂(g)→ 2 NH₃(g)

If it takes 2 cups of milk and 1 cup of cocoa mix to make three servings of hot chocolate,and you only have 1 cup of each,then you cannot make any hot chocolate.

Consider the following equation: CO + 2 H₂ → CH₃OH △H rxn = -128 kJ Calculate the amount of heat (in kJ)associated with complete reaction of 8.08 g H₂.

If the theoretical yield of the reaction below corresponds to 25.3 g and the percent yield of the reaction is known to be reproducibly 81.1%,calculate the actual yield. Given: Li₂O + H₂O → 2 LiOH

How many moles of lithium nitrate are theoretically produced if we start with 3.4 moles of Ca(NO₃)₂ and 2.4 moles of Li₃PO₄? Reaction: 3Ca(NO₃)₂+ 2Li₃PO₄→ 6LiNO₃ + Ca₃(PO₄)₂

Starting with 156 g Li₂O and 33.3 g H₂O,decide which reactant is present in limiting quantities. Given: Li₂O + H₂O → 2 LiOH

Which is the limiting reactant in the following reaction given that you start with 15.5 g of Na₂S and 12.1 g CuSO₄? Reaction: Na₂S + CuSO₄→ Na₂SO₄ + CuS

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Exam 8: Quantities in Chemical Reactions

What is the percent yield of CuS for the following reaction given that you start with 15.5 g of Na2S and 12.1 g CuSO4? The actual amount of CuS produced was 3.05 g. Reaction: Na2S + CuSO4 → Na2SO4 + CuS

A 24.0 g sample of nitrogen gas reacts with an excess of hydrogen gas to give an actual yield of 3.85 g NH3.What is the percent yield for this reaction? Reaction: N2(g)+ 3 H2(g)→ 2 NH3(g)

If it takes 2 cups of milk and 1 cup of cocoa mix to make three servings of hot chocolate,and you only have 1 cup of each,then you cannot make any hot chocolate.

Consider the following equation: CO + 2 H2 → CH3OH △H rxn = -128 kJ Calculate the amount of heat (in kJ)associated with complete reaction of 8.08 g H2.

If the theoretical yield of the reaction below corresponds to 25.3 g and the percent yield of the reaction is known to be reproducibly 81.1%,calculate the actual yield. Given: Li2O + H2O → 2 LiOH

How many moles of lithium nitrate are theoretically produced if we start with 3.4 moles of Ca(NO3)2 and 2.4 moles of Li3PO4? Reaction: 3Ca(NO3)2 + 2Li3PO4 → 6LiNO3 + Ca3(PO4)2

Starting with 156 g Li2O and 33.3 g H2O,decide which reactant is present in limiting quantities. Given: Li2O + H2O → 2 LiOH

Which is the limiting reactant in the following reaction given that you start with 15.5 g of Na2S and 12.1 g CuSO4? Reaction: Na2S + CuSO4 → Na2SO4 + CuS

The Chemical World

Measurement and Problem Solving

Matter and Energy

Atoms and Elements

Molecules and Compounds

Chemical Composition

Chemical Reactions

Electrons in Atoms and the Periodic Table

Chemical Bonding

Gases

Liquids,solids,and Intermolecular Forces

Solutions

Acids and Bases

Chemical Equilibrium

Oxidation and Reduction

Radioactivity and Nuclear Chemistry

Organic Chemistry

Biochemistry

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What is the percent yield of CuS for the following reaction given that you start with 15.5 g of Na₂S and 12.1 g CuSO₄? The actual amount of CuS produced was 3.05 g. Reaction: Na₂S + CuSO₄→ Na₂SO₄ + CuS

A 24.0 g sample of nitrogen gas reacts with an excess of hydrogen gas to give an actual yield of 3.85 g NH₃.What is the percent yield for this reaction? Reaction: N₂(g)+ 3 H₂(g)→ 2 NH₃(g)

Consider the following equation: CO + 2 H₂ → CH₃OH △H rxn = -128 kJ Calculate the amount of heat (in kJ)associated with complete reaction of 8.08 g H₂.

If the theoretical yield of the reaction below corresponds to 25.3 g and the percent yield of the reaction is known to be reproducibly 81.1%,calculate the actual yield. Given: Li₂O + H₂O → 2 LiOH

How many moles of lithium nitrate are theoretically produced if we start with 3.4 moles of Ca(NO₃)₂ and 2.4 moles of Li₃PO₄? Reaction: 3Ca(NO₃)₂+ 2Li₃PO₄→ 6LiNO₃ + Ca₃(PO₄)₂

Starting with 156 g Li₂O and 33.3 g H₂O,decide which reactant is present in limiting quantities. Given: Li₂O + H₂O → 2 LiOH

Which is the limiting reactant in the following reaction given that you start with 15.5 g of Na₂S and 12.1 g CuSO₄? Reaction: Na₂S + CuSO₄→ Na₂SO₄ + CuS