Question 1

Consider the following generic chemical equation: 2A + 5B → C + 3D
If you react 4 units of A with 10 units of B,which statement is TRUE?

Accepted Answer

A) Substance A will be the limiting reactant. 
B) Substance B will be the limiting reactant. 
C) There is just enough of A and B so that everything reacts completely. 
D) Substance C cannot be formed from this reaction. 
E) none of the above 
A) Substance A will be the limiting reactant. 
B) Substance B will be the limiting reactant. 
C) There is just enough of A and B so that everything reacts completely. 
D) Substance C cannot be formed from this reaction. 
E) none of the above

Question 2

How many moles of water are made from complete reaction of 2.2 moles of oxygen gas with hydrogen gas?
Given the reaction: 2H2 + O2 → 2H2O

Accepted Answer

A) 4.4 
B) 1.1 
C) 2.2 
D) 3.3 
E) not enough information 
A) 4.4 
B) 1.1 
C) 2.2 
D) 3.3 
E) not enough information

Question 3

Before determining conversion factors,it is necessary to make sure the equation is properly balanced.

Accepted Answer

A) True 
 B)False

Question 4

Given that 4 NH3 + 5 O2 → 4 NO + 6 H2O,if 3.00 mol NH3 were made to react with excess of oxygen gas,the amount of H2O formed would be

Accepted Answer

A) 2.00 mol. 
B) 3.00 mol. 
C) 4.50 mol. 
D) 6.00 mol. 
E) none of the above 
A) 2.00 mol. 
B) 3.00 mol. 
C) 4.50 mol. 
D) 6.00 mol. 
E) none of the above

Question 5

The conversion factor between mass and moles for a compound is the molar mass.

Accepted Answer

A) True 
 B)False

Question 6

The limiting reactant is the reactant that produces the maximum amount of product.

Accepted Answer

A) True 
 B)False

Question 7

Given the recipe: 2 cups flour + 1 egg + 3 oz blueberries → 4 muffins
If you have 9 cups of flour,4 eggs and plenty of blueberries,the theoretical yield of muffins is 16.

Accepted Answer

A) True 
 B)False

Question 8

What is the theoretical yield in grams of CuS for the following reaction given that you start with 15.5 g of Na2S and 12.1 g CuSO4?
Reaction: Na2S + CuSO4 → Na2SO4 + CuS

Accepted Answer

A) 0.0758 
B) 0.198 
C) 18.93 
D) 7.25 
E) not enough information 
A) 0.0758 
B) 0.198 
C) 18.93 
D) 7.25 
E) not enough information

Question 9

The limiting reactant is not necessarily the reactant with the least mass.

Accepted Answer

A) True 
 B)False

Question 10

Given the recipe: 2 cups flour + 1 egg + 3 oz blueberries → 4 muffins.
You can make 1 dozen muffins from 3 eggs.

Accepted Answer

A) True 
 B)False

Question 11

For the following reaction you have 8 grams of hydrogen and 2 grams of oxygen.
2H2 + O2 → 2H2O
The excess reactant is the oxygen.

Accepted Answer

A) True 
 B)False

Question 12

The reaction of one mole of nitrogen gas with three moles of hydrogen gas releases 92 kJ of thermal energy to the surroundings.Which of the following is TRUE?

Accepted Answer

A) This reaction is exothermic. 
B) This reaction has a negative enthalpy of reaction. 
C) Complete reaction of two moles of nitrogen gas would release 184 kJ of thermal
Energy in this reaction. 
D) All of the above are true. 
E) None of the above are true. 
A) This reaction is exothermic. 
B) This reaction has a negative enthalpy of reaction. 
C) Complete reaction of two moles of nitrogen gas would release 184 kJ of thermal
Energy in this reaction. 
D) All of the above are true. 
E) None of the above are true.

Question 13

What is the theoretical yield of waffles if you have 6 cups of flour,9 eggs and 2 tbs of oil?
Given: 2 cups flour + 3 eggs + 1 tbs oil → 4 waffles

Accepted Answer

A) 10 
B) 12 
C) 8 
D) 4 
E) not enough information 
A) 10 
B) 12 
C) 8 
D) 4 
E) not enough information

Question 14

What is the excess reactant for the following reaction given we have 3.4 moles of Ca(NO3)2 and 2.4 moles of Li3PO4?
Reaction: 3Ca(NO3)2 + 2Li3PO4 → 6LiNO3 + Ca3(PO4)2

Accepted Answer

A) Ca(NO3)2 
B) Li3PO4 
C) LiNO3 
D) Ca3(PO4)2 
E) not enough information 
A) Ca(NO3)2 
B) Li3PO4 
C) LiNO3 
D) Ca3(PO4)2 
E) not enough information

Question 15

The actual yield is the same as the theoretical yield if the reaction goes to completion and there is no loss of product.

Accepted Answer

A) True 
 B)False

Question 16

How many grams of water are theoretically produced for the following reaction given we have 2.6 moles of HCl and 1.4 moles of Ca(OH)2?
Reaction: 2HCl + Ca(OH)2 → 2H2O + CaCl2

Accepted Answer

A) 25.2 
B) 50.4 
C) 46.8 
D) 103.6 
E) not enough information 
A) 25.2 
B) 50.4 
C) 46.8 
D) 103.6 
E) not enough information

Question 17

What is the limiting reactant for the reaction below given that you start with 10.0 grams of Al and 19.0 grams of O2?
Reaction: 4Al + 3O2 → 2Al2O3

Accepted Answer

A) Al 
B) O2 
C) Al2O3 
D) both Al and O2 
E) not enough information 
A) Al 
B) O2 
C) Al2O3 
D) both Al and O2 
E) not enough information

Question 18

How many grams of NO2 are theoretically produced if we start with 1.20 moles of S and 9.90 moles of HNO3?
Reaction: S + 6HNO3 → H2SO4 + 6NO2 + 2H2O

Accepted Answer

A) 7.20 
B) 331 
C) 455 
D) 786 
E) not enough information 
A) 7.20 
B) 331 
C) 455 
D) 786 
E) not enough information

Question 19

One of the advantages of burning fossil fuels is that it produces O2 for humans to breathe.

Accepted Answer

A) True 
 B)False

Question 20

Determine the theoretical yield of C when 3 units of A and 10 units of B are reacted in the following generic chemical equation: 2A + 5B → 4C.

Accepted Answer

A) 3 
B) 4 
C) 6 
D) 8 
E) none of the above 
A) 3 
B) 4 
C) 6 
D) 8 
E) none of the above

Consider the following generic chemical equation: 2A + 5B → C + 3D If you react 4 units of A with 10 units of B,which statement is TRUE?

How many moles of water are made from complete reaction of 2.2 moles of oxygen gas with hydrogen gas? Given the reaction: 2H₂ + O₂ → 2H₂O

Before determining conversion factors,it is necessary to make sure the equation is properly balanced.

Given that 4 NH₃ + 5 O₂ → 4 NO + 6 H₂O,if 3.00 mol NH₃were made to react with excess of oxygen gas,the amount of H₂O formed would be

The conversion factor between mass and moles for a compound is the molar mass.

The limiting reactant is the reactant that produces the maximum amount of product.

Given the recipe: 2 cups flour + 1 egg + 3 oz blueberries → 4 muffins If you have 9 cups of flour,4 eggs and plenty of blueberries,the theoretical yield of muffins is 16.

What is the theoretical yield in grams of CuS for the following reaction given that you start with 15.5 g of Na₂S and 12.1 g CuSO₄? Reaction: Na₂S + CuSO₄→ Na₂SO₄ + CuS

The limiting reactant is not necessarily the reactant with the least mass.

Given the recipe: 2 cups flour + 1 egg + 3 oz blueberries → 4 muffins. You can make 1 dozen muffins from 3 eggs.

For the following reaction you have 8 grams of hydrogen and 2 grams of oxygen. 2H₂ + O₂ → 2H₂O The excess reactant is the oxygen.

The reaction of one mole of nitrogen gas with three moles of hydrogen gas releases 92 kJ of thermal energy to the surroundings.Which of the following is TRUE?

What is the theoretical yield of waffles if you have 6 cups of flour,9 eggs and 2 tbs of oil? Given: 2 cups flour + 3 eggs + 1 tbs oil → 4 waffles

What is the excess reactant for the following reaction given we have 3.4 moles of Ca(NO₃)₂ and 2.4 moles of Li₃PO₄? Reaction: 3Ca(NO₃)₂+ 2Li₃PO₄→ 6LiNO₃ + Ca₃(PO₄)₂

The actual yield is the same as the theoretical yield if the reaction goes to completion and there is no loss of product.

How many grams of water are theoretically produced for the following reaction given we have 2.6 moles of HCl and 1.4 moles of Ca(OH)₂? Reaction: 2HCl + Ca(OH)₂→ 2H₂O+ CaCl₂

What is the limiting reactant for the reaction below given that you start with 10.0 grams of Al and 19.0 grams of O₂? Reaction: 4Al + 3O₂ → 2Al₂O₃

How many grams of NO₂ are theoretically produced if we start with 1.20 moles of S and 9.90 moles of HNO₃? Reaction: S+ 6HNO₃→ H₂SO₄ + 6NO₂ + 2H₂O

One of the advantages of burning fossil fuels is that it produces O₂ for humans to breathe.

Determine the theoretical yield of C when 3 units of A and 10 units of B are reacted in the following generic chemical equation: 2A + 5B → 4C.

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Exam 8: Quantities in Chemical Reactions

Consider the following generic chemical equation: 2A + 5B → C + 3D If you react 4 units of A with 10 units of B,which statement is TRUE?

How many moles of water are made from complete reaction of 2.2 moles of oxygen gas with hydrogen gas? Given the reaction: 2H2 + O2 → 2H2O

Before determining conversion factors,it is necessary to make sure the equation is properly balanced.

Given that 4 NH3 + 5 O2 → 4 NO + 6 H2O,if 3.00 mol NH3 were made to react with excess of oxygen gas,the amount of H2O formed would be

The conversion factor between mass and moles for a compound is the molar mass.

The limiting reactant is the reactant that produces the maximum amount of product.

Given the recipe: 2 cups flour + 1 egg + 3 oz blueberries → 4 muffins If you have 9 cups of flour,4 eggs and plenty of blueberries,the theoretical yield of muffins is 16.

What is the theoretical yield in grams of CuS for the following reaction given that you start with 15.5 g of Na2S and 12.1 g CuSO4? Reaction: Na2S + CuSO4 → Na2SO4 + CuS

The limiting reactant is not necessarily the reactant with the least mass.

Given the recipe: 2 cups flour + 1 egg + 3 oz blueberries → 4 muffins. You can make 1 dozen muffins from 3 eggs.

For the following reaction you have 8 grams of hydrogen and 2 grams of oxygen. 2H2 + O2 → 2H2O The excess reactant is the oxygen.

The reaction of one mole of nitrogen gas with three moles of hydrogen gas releases 92 kJ of thermal energy to the surroundings.Which of the following is TRUE?

What is the theoretical yield of waffles if you have 6 cups of flour,9 eggs and 2 tbs of oil? Given: 2 cups flour + 3 eggs + 1 tbs oil → 4 waffles

What is the excess reactant for the following reaction given we have 3.4 moles of Ca(NO3)2 and 2.4 moles of Li3PO4? Reaction: 3Ca(NO3)2 + 2Li3PO4 → 6LiNO3 + Ca3(PO4)2

The actual yield is the same as the theoretical yield if the reaction goes to completion and there is no loss of product.

How many grams of water are theoretically produced for the following reaction given we have 2.6 moles of HCl and 1.4 moles of Ca(OH)2? Reaction: 2HCl + Ca(OH)2 → 2H2O + CaCl2

What is the limiting reactant for the reaction below given that you start with 10.0 grams of Al and 19.0 grams of O2? Reaction: 4Al + 3O2 → 2Al2O3

How many grams of NO2 are theoretically produced if we start with 1.20 moles of S and 9.90 moles of HNO3? Reaction: S + 6HNO3 → H2SO4 + 6NO2 + 2H2O

One of the advantages of burning fossil fuels is that it produces O2 for humans to breathe.

Determine the theoretical yield of C when 3 units of A and 10 units of B are reacted in the following generic chemical equation: 2A + 5B → 4C.

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

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How many moles of water are made from complete reaction of 2.2 moles of oxygen gas with hydrogen gas? Given the reaction: 2H₂ + O₂ → 2H₂O

Given that 4 NH₃ + 5 O₂ → 4 NO + 6 H₂O,if 3.00 mol NH₃were made to react with excess of oxygen gas,the amount of H₂O formed would be

What is the theoretical yield in grams of CuS for the following reaction given that you start with 15.5 g of Na₂S and 12.1 g CuSO₄? Reaction: Na₂S + CuSO₄→ Na₂SO₄ + CuS

For the following reaction you have 8 grams of hydrogen and 2 grams of oxygen. 2H₂ + O₂ → 2H₂O The excess reactant is the oxygen.

What is the excess reactant for the following reaction given we have 3.4 moles of Ca(NO₃)₂ and 2.4 moles of Li₃PO₄? Reaction: 3Ca(NO₃)₂+ 2Li₃PO₄→ 6LiNO₃ + Ca₃(PO₄)₂

How many grams of water are theoretically produced for the following reaction given we have 2.6 moles of HCl and 1.4 moles of Ca(OH)₂? Reaction: 2HCl + Ca(OH)₂→ 2H₂O+ CaCl₂

What is the limiting reactant for the reaction below given that you start with 10.0 grams of Al and 19.0 grams of O₂? Reaction: 4Al + 3O₂ → 2Al₂O₃

How many grams of NO₂ are theoretically produced if we start with 1.20 moles of S and 9.90 moles of HNO₃? Reaction: S+ 6HNO₃→ H₂SO₄ + 6NO₂ + 2H₂O

One of the advantages of burning fossil fuels is that it produces O₂ for humans to breathe.