Deck 4: Quantities of Reactants and Products

Question 1

Which statement about the expression 6 C₆H₁₂O₆ is not true?

A) There are half as many oxygen atoms as hydrogen atoms.
B) There are 144 total atoms.
C) There are twice as many hydrogen atoms as carbon atoms.
D) There are six times as many carbon atoms as oxygen atoms.
E) There are 6 total molecules.

Answer 1

There are six times as many carbon atoms as oxygen atoms.

Question 2

Classify the following reaction.

A) decomposition
B) exchange
C) combination
D) displacement
E) combustion

Answer 2

decomposition

Question 3

Which of the following cannot be determined from a balanced chemical equation?

A) The relative mass of each reactant and product.
B) The number of moles of reactants and products.
C) The number of molecules of reactants and products.
D) The number of atoms of each element reacting.
E) Whether the reaction will proceed as written.

Answer 3

Whether the reaction will proceed as written.

Question 4

Classify the following reaction.

A) combination
B) decomposition
C) combustion
D) exchange
E) displacement

Question 5

Classify the following reaction.

A) combustion
B) exchange
C) combination
D) decomposition
E) displacement

Question 6

Classify the following reaction.

A) exchange
B) decomposition
C) displacement
D) combustion
E) combination

Question 7

In the reaction given below, how many grams of sodium metal are consumed if 2.02 g of hydrogen gas are produced?

A) 92.0 g
B) 5.75 g
C) 11.5 g
D) 23.0 g
E) 46.0 g

Question 8

Classify the following reaction.

A) combustion
B) exchange
C) combination
D) decomposition
E) displacement

Question 9

Classify the following reaction.

A) combustion
B) exchange
C) combination
D) decomposition
E) displacement

Question 10

For the reaction given below, how many moles of aluminum will react if 12 moles of Br₂ react and 8 moles of AlBr₃ are produced?

A) 4
B) 8
C) 12
D) 16
E) 40

Question 11

In the reaction shown below, which substances are dissolved in water?

A) H₂SO₄ and CuSO₄
B) Cu and CuSO₄
C) Cu
D) H₂ and H₂SO₄
E) H₂ and Cu

Question 12

In the reaction given below, if 12 moles of aluminum oxide are consumed, how many moles of oxygen gas are produced?

A) 3
B) 4
C) 6
D) 12
E) 18

Question 13

In the reaction given below, for every two molecules of aluminum oxide consumed, how many molecules of oxygen are produced?

A) 1
B) 2
C) 3
D) 6
E) 9

Question 14

In the reaction given below, how many grams of water are consumed if 4.0 g of hydrogen gas and 32.0 g of oxygen gas are produced?

A) 2.0 g
B) 4.0 g
C) 18.0 g
D) 20.0 g
E) 36.0 g

Question 15

Classify the following reaction.

A) exchange
B) combination
C) decomposition
D) displacement
E) combustion

Question 16

Classify the following reaction.

A) combustion
B) exchange
C) combination
D) decomposition
E) displacement

Question 17

Classify the following reaction.

A) decomposition
B) displacement
C) combustion
D) exchange
E) combination

Question 18

Classify the following reaction.

A) combustion
B) exchange
C) combination
D) decomposition
E) displacement

Question 19

Which statement regarding the complete combustion of a carbon compound is correct?

A) Carbon dioxide and water are consumed in the reaction and must be shown in the balanced equation.
B) Heat is produced in the reaction and must be shown in the balanced equation.
C) Balancing the equation requires knowing whether the products are gases or liquids.
D) Oxygen is consumed in the reaction and must be shown in the balanced equation.
E) The carbon compound is consumed in the reaction but need not be shown in the balanced equation.

Question 20

Classify the following reaction.

A) combination
B) decomposition
C) combustion
D) exchange
E) displacement

Question 21

How many grams of Na₂O are formed by the complete reaction of 35.0 g of O₂?

A) 33.9 g
B) 56.7 g
C) 67.8 g
D) 113 g
E) 136 g

Question 22

The Roman numerals in the reaction given represent the coefficients in the balanced chemical equation. What are the values of the coefficients?

A)
B)
C)
D)
E)

Question 23

The Roman numerals in the reaction given represent the coefficients in the balanced chemical equation. What are the values of the coefficients?

A)
B)
C)
D)
E)

Question 24

The Roman numerals in the reaction given represent the coefficients in the balanced chemical equation. What are the values of the coefficients?

A)
B)
C)
D)
E)

Question 25

How many moles of H₂O are formed from the complete combustion of 45.0 g of methanol, CH₃OH?

A) 0.711 mol
B) 1.41 mol
C) 1.42 mol
D) 2.81 mol
E) 50.6 mol

Question 26

How many moles of O₂ will be produced by the decomposition of 32.0 grams of hydrogen peroxide, H₂O₂?

A) 34.0 mol
B) 0.470 mol
C) 0.941 mol
D) 1.88 mol
E) 544 mol

Question 27

How many grams of TiCl₄ are needed to produce 0.132 moles of MgCl₂?

A) 6.26 g
B) 12.5 g
C) 12.6 g
D) 25.0 g
E) 50.1 g

Question 28

How many mol of ammonia will be formed from the complete reaction of 45.0 g of H₂?

A) 11.1 mol
B) 14.9 mol
C) 16.7 mol
D) 7.43 mol
E) 22.3 mol

Question 29

The Roman numerals in the reaction given represent the coefficients in the balanced chemical equation. What are the values of the coefficients?

A)
B)
C)
D)
E)

Question 30

The Roman numerals in the reaction given represent the coefficients in the balanced chemical equation. What are the values of the coefficients?

A)
B)
C)
D)
E)

Question 31

The Roman numerals in the reaction given represent the coefficients in the balanced chemical equation. What are the values of the coefficients?

A)
B)
C)
D)
E)

Question 32

How many grams of Fe₂O₃ are formed by the complete reaction of 6.75 moles of iron?

A) 242 g
B) 350 g
C) 539 g
D) 701 g
E) 1080 g

Question 33

How many moles of oxygen will be produced if 27.6 grams of Al are produced?

A) 1.02 mol
B) 0.256 mol
C) 0.767 mol
D) 24.6 mol
E) 12.3 mol

Question 34

How many grams of CuCl are formed from the complete reaction of 0.750 mol Cu?

A) 148.5 g
B) 101 g
C) 74.5 g
D) 43.6 g
E) 32.2 g

Question 35

The Roman numerals in the reaction given represent the coefficients in the balanced chemical equation. What are the values of the coefficients?

A)
B)
C)
D)
E)

Question 36

How many grams of Al₂O₃ are formed by the complete reaction of 48.5 g of Fe₂O₃?

A) 26.1 g
B) 31.0g
C) 37.7 g
D) 62.4 g
E) 139 g

Question 37

The Roman numerals in the reaction given represent the coefficients in the balanced chemical equation. What are the values of the coefficients?

A)
B)
C)
D)
E)

Question 38

The Roman numerals in the reaction given represent the coefficients in the balanced chemical equation. What are the values of the coefficients?

A)
B)
C)
D)
E)

Question 39

How many grams of KClO₃ are needed to produce of 4.26 moles of O₂?

A) 136 g
B) 174 g
C) 348 g
D) 522 g
E) 783 g

Question 40

The Roman numerals in the reaction given represent the coefficients in the balanced chemical equation. What are the values of the coefficients?

A)
B)
C)
D)
E)

Question 41

A combination reaction is considered the opposite of a(n) _____________ reaction.

Question 42

What is the maximum possible quantity of product obtained from a chemical reaction called?

A) percent yield
B) molecular weight of the product
C) stoichiometric coefficients
D) limiting reactant
E) theoretical yield

Question 43

If 225 g of carbon reacts with excess sulfur dioxide to produce 195 g of carbon disulfide, what is the percent yield for the reaction?

A) 78.9%
B) 68.4%
C) 22.5%
D) 19.5%
E) 15.7%

Question 44

If 935 g of cesium reacts with excess chlorine to produce 1036 g of cesium chloride, what is the percent yield for the reaction?

A) 43.7%
B) 87.5%
C) 90.3%
D) 101%
E) None of these

Question 45

Stoichiometric coefficients found in a balanced equation can be used to derive _____________ ratios.

Question 46

In the reaction given, if 25.0 g of each reactant is present, which reactant is in excess?

Question 47

In the reaction given below, how many grams of C₁₄H₉Cl₅ will be produced by the reaction of 25.0 g of each of the starting materials?

A) 39.4 g
B) 78.7 g
C) 121 g
D) 157 g
E) 354 g

Question 48

How many grams of PH₃ are formed by the complete reaction of 52.5 g of H₂?

A) 885 g
B) 590 g
C) 17.4 g
D) 8.68 g
E) 0.843 g

Question 49

How many grams of HCl are required to completely react with 25.0 g of aluminum?

A) 22.6 g
B) 67.5 g
C) 101 g
D) 136 g
E) 248 g

Question 50

The complete reaction of 16.12 g of titanium with 23.88 g of chlorine (Cl₂) produces a compound with the formula Ti_xCl_y. What is the empirical formula of the compound?

A) TiCl
B) Ti₂Cl
C) Ti₄Cl
D) TiCl₂
E) TiCl₄

Question 51

How many grams of MgI₂ are produced by the reaction of 25.0 g of Mg with 25.0 g of I₂?

A) 9.20 g
B) 18.4 g
C) 27.4 g
D) 49.0 g
E) 195 g

Question 52

The complete reaction of 2.63 g of iron with 3.34 g of chlorine (Cl₂) produces a compound with the formula Fe_xCl_y. What is the empirical formula of the compound?

A) FeCl
B) FeCl₂
C) FeCl₃
D) FeCl₄
E) FeCl₅

Question 53

The reaction below is an example of a(n) _____________ reaction.

Question 54

The efficiency of a particular synthesis method is evaluated by determining the:

A) molecular weight of the product.
B) stoichiometric coefficients.
C) limiting reactant.
D) theoretical yield.
E) percent yield.

Question 55

If 32.0 g of oxygen reacts with sufficient magnesium to produce magnesium oxide, what is the theoretical yield?

A) 20.2 g
B) 32.0 g
C) 40.3 g
D) 80.6 g
E) 161 g

Question 56

In the reaction given, how many grams of oxygen will completely react with 18.0 g of water?

Question 57

The complete combustion of a hydrocarbon produces 90.36 g of CO₂ and 46.25 g of H₂O. What is the empirical formula of the hydrocarbon?

A) CH
B) CH₂
C) C₂H₅
D) C₃H₈
E) C₃H₄

Question 58

A decomposition reaction occurs when _____________ reactant(s) produces two or more products.

Question 59

In the reaction below, 8.0 g of H₂ react with 7.0 g of O₂. Which of the following statements is incorrect?

A) More moles of hydrogen are consumed than moles of oxygen.
B) More grams of hydrogen are consumed than grams of oxygen.
C) More grams of oxygen are consumed than grams of hydrogen.
D) More moles of water are produced than moles of oxygen are consumed.
E) More grams of water are produced than grams of oxygen are consumed.

Question 60

If 110.0 g of iron reacts with 64.0 g of oxygen, what is the theoretical yield of Fe₂O₃?

A) 157.3 g
B) 212.9 g
C) 314.9 g
D) 319.4 g
E) 629.2 g

Question 61

What is the theoretical yield (in grams of NaCl) when 0.750 mol of sodium reacts with excess chlorine to produce NaCl?

Question 63

What is the percent yield when 0.750 mol of calcium reacts with sufficient oxygen to produce 34.4 g of CaO?

Question 64

The Roman numerals in the equation given represent the coefficients in the balanced chemical equation. Give their values.

Question 65

A reaction has a theoretical yield of 48.23 g. It produces 28.81 g of product. Calculate the percent yield.

Question 66

Match the following: