8.1
The balanced equation of 4Al + 3O2 → 2Al2O3 can
be interpreted by saying that 1 mol of Al:
1. Reacts with 3 mol of O2
2. Produces 1 mol of Al2O3
3. Produces 0.5 mol Al2O3
4. Reacts with 2 mol of O2
5. Cannot react with O2
Tro IC3
8.1
The balanced equation of 4Al + 3O2 → 2Al2O3 can
be interpreted by saying that 1 mol of Al:
1. Reacts with 3 mol of O2
2. Produces 1 mol of Al2O3
3. Produces 0.5 mol Al2O3
4. Reacts with 2 mol of O2
5. Cannot react with O2
Tro IC3
8.2
How many moles of oxygen are needed to produce
6 mol of Fe2O3 in the following equation:
4Fe + 3O2 → 2Fe2O3?
1. 3
2. 1
3. 6
4. 9
5. 18
Tro IC3
8.2
How many moles of oxygen are needed to produce
6 mol of Fe2O3 in the following equation:
4Fe + 3O2 → 2Fe2O3?
1. 3
2. 1
3. 6
4. 9
5. 18
Tro IC3
8.3
How many moles of gaseous oxygen are required
for the complete combustion of 4.0 mol of butane
(C4H10)?
1. 4.0
2. 8.0
3. 13
4. 26
5. 52
Tro IC3
8.3
How many moles of gaseous oxygen are required
for the complete combustion of 4.0 mol of butane
(C4H10)?
1. 4.0
2. 8.0
3. 13
4. 26
5. 52
Tro IC3
8.4
How many grams of oxygen are required to
completely burn 5.90 g of C3H8 in the following
unbalanced equation:
C3H8(g) + O2(g) → CO2(g) + H2O(g)?
1. 5.90 g
2. 21.4 g
3. 4.28 g
4. 10.7 g
5. 29.5 g
Tro IC3
8.4
How many grams of oxygen are required to
completely burn 5.90 g of C3H8 in the following
unbalanced equation:
C3H8(g) + O2(g) → CO2(g) + H2O(g)?
1. 5.90 g
2. 21.4 g
3. 4.28 g
4. 10.7 g
5. 29.5 g
Tro IC3
8.5
How many grams of aluminum sulfate are produced
from 2.67 mol sulfuric acid in the following
unbalanced equation:
Al2O3(s) + H2SO4(aq) → Al2(SO4)3(aq) + H2O(l)?
1. 305 g
2. 457 g
3. 272 g
4. 914 g
5. 342 g
Tro IC3
8.5
How many grams of aluminum sulfate are produced
from 2.67 mol sulfuric acid in the following
unbalanced equation:
Al2O3(s) + H2SO4(aq) → Al2(SO4)3(aq) + H2O(l)?
1. 305 g
2. 457 g
3. 272 g
4. 914 g
5. 342 g
Tro IC3
8.6
1. 34.9
How many moles of phosphorus are required to
produce 15.5 g P4O6 in the following equation:
4P(s) + 3O2(g) → P4O6(s)?
mol
2. 0.0703 mol
3. 4.00
mol
4. 2.18
mol
5. 0.282 mol
Tro IC3
8.6
1. 34.9
How many moles of phosphorus are required to
produce 15.5 g P4O6 in the following equation:
4P(s) + 3O2(g) → P4O6(s)?
mol
2. 0.0703 mol
3. 4.00
mol
4. 2.18
mol
5. 0.282 mol
Tro IC3
8.7
How many moles of oxygen gas are produced from
the following decomposition of 3.0 mol of Al2O3,
assuming a 85% yield: 2Al2O3 → 4Al + 3O2?
1. 4.5 mol
2. 3.8 mol
3. 5.3 mol
4. 3.0 mol
5. 4.2 mol
Tro IC3
8.7
How many moles of oxygen gas are produced from
the following decomposition of 3.0 mol of Al2O3,
assuming a 85% yield: 2Al2O3 → 4Al + 3O2 ?
1. 4.5 mol
2. 3.8 mol
3. 5.3 mol
4. 3.0 mol
5. 4.2 mol
Tro IC3
8.8
How many kg of methane (CH4) are produced from
25.0 kg of hydrogen in the following catalytic
methanation: 3H2 + CO → CH4 + H2O?
1. 115 kg
2. 74.3 kg
3. 134 kg
4. 25.0 kg
5. 66.2 kg
Tro IC3
8.8
How many kg of methane (CH4) are produced from
25.0 kg of hydrogen in the following catalytic
methanation: 3H2 + CO → CH4 + H2O?
1. 115 kg
2. 74.3 kg
3. 134 kg
4. 25.0 kg
5. 66.2 kg
Tro IC3
8.9
How many moles of water are produced from the
combustion of 3.5 mol of hydrogen and 5.2 mol of
oxygen?
1. 7.0 mol
2. 5.2 mol
3. 3.5 mol
4. 10. mol
5. 1.8 mol
Tro IC3
8.9
How many moles of water are produced from the
combustion of 3.5 mol of hydrogen and 5.2 mol of
oxygen?
1. 7.0 mol
2. 5.2 mol
3. 3.5 mol
4. 10. mol
5. 1.8 mol
Tro IC3
8.10
How many grams of NO are produced from the
oxidation of 14.5 g of NH3 by 12.2 g of O2 in the
following equation: 4NH3 + 5O2 → 4NO + 6H2O?
1. 0.305 g
2. 25.5 g
3. 18.3 g
4. 9.15 g
5. 0.851 g
Tro IC3
8.10
How many grams of NO are produced from the
oxidation of 14.5 g of NH3 by 12.2 g of O2 in the
following equation: 4NH3 + 5O2 → 4NO + 6H2O?
1. 0.305 g
2. 25.5 g
3. 18.3 g
4. 9.15 g
5. 0.851 g
Tro IC3
8.11
1.
2.
3.
4.
5.
Tro IC3
How many grams of the excess reagent are left over
after the reaction of 4.36 g of Al and 8.50 g HCl in
the following unbalanced equation:
Al + HCl → AlCl3 + H2?
2.26 g
4.14 g
2.3 g
21.5 g
10.4 g
8.11
1.
2.
3.
4.
5.
Tro IC3
How many grams of the excess reagent are left over
after the reaction of 4.36 g of Al and 8.50 g HCl in
the following unbalanced equation:
Al + HCl → AlCl3 + H2?
2.26 g
4.14 g
2.3 g
21.5 g
10.4 g
8.12
1.
2.
3.
4.
5.
Tro IC3
How many molecules of water are produced from
the combustion of 2.56 mol of octane in the
following equation:
2C8H18 + 25O2 → 16CO2 + 18H2O?
1.08 x 1025
2.77 x 1025
2.56 x 1025
1.39 x 1025
6.02 x 1023
8.12
1.
2.
3.
4.
5.
Tro IC3
How many molecules of water are produced from
the combustion of 2.56 mol of octane in the
following equation:
2C8H18 + 25O2 → 16CO2 + 18H2O?
1.08 x 1025
2.77 x 1025
2.56 x 1025
1.39 x 1025
6.02 x 1023
8.13
1.
2.
3.
4.
5.
Tro IC3
How many molecules of oxygen are produced from
the decomposition of 8.75 g of hydrogen peroxide
in the following equation: 2H2O2 → 2H2 + O2?
8.75 x 1024
7.74 x 1022
1.55 x 1022
5.27 x 1024
6.02 x 1023
8.13
1.
2.
3.
4.
5.
Tro IC3
How many molecules of oxygen are produced from
the decomposition of 8.75 g of hydrogen peroxide
in the following equation: 2H2O2 → 2H2 + O2?
8.75 x 1024
7.74 x 1022
1.55 x 1022
5.27 x 1024
6.02 x 1023
8.14
1.
2.
3.
4.
5.
Tro IC3
How many molecules of ammonia are produced
from 7.54 x 1025 molecules of hydrogen in the
following equation: 3H2 + N2 → 2NH3?
2
7.54 x 1025
5.03 x 1025
1.51 x 1026
6.02 x 1023
molecules
molecules
molecules
molecules
molecules
8.14
1.
2.
3.
4.
5.
Tro IC3
How many molecules of ammonia are produced
from 7.54 x 1025 molecules of hydrogen in the
following equation: 3H2 + N2 → 2NH3?
2
7.54 x 1025
5.03 x 1025
1.51 x 1026
6.02 x 1023
molecules
molecules
molecules
molecules
molecules
8.15
How many molecules of CO2 are produced from the
combustion of 2 molecules of C8H18 and 5
molecules of O2? (Hint: This is a tricky question.)
1.
2.
3.
4.
5.
Tro IC3
1.93 x 1024 molecules
16
molecules
9.63 x 1024 molecules
3
molecules
3.2 x 1024 molecules
8.15
How many molecules of CO2 are produced from the
combustion of 2 molecules of C8H18 and 5
molecules of O2? (Hint: This is a tricky question.)
1.
2.
3.
4.
5.
Tro IC3
1.93 x 1024 molecules
16
molecules
9.63 x 1024 molecules
3
molecules
3.2 x 1024 molecules
8.16
1.
2.
3.
4.
5.
Tro IC3
What is the theoretical yield of acetic acid when
22.5 g of methanol reacts with 32.0 g of carbon
monoxide in the following equation:
CH3OH + CO → HC2H3O2?
24.2 g
32.0 g
42.2 g
68.6 g
84.4 g
8.16
1.
2.
3.
4.
5.
Tro IC3
What is the theoretical yield of acetic acid when
22.5 g of methanol reacts with 32.0 g of carbon
monoxide in the following equation:
CH3OH + CO → HC2H3O2?
24.2 g
32.0 g
42.2 g
68.6 g
84.4 g
8.17
1.
2.
3.
4.
5.
What is the theoretical yield of SO3 from the
combustion of 3.00 mol of S and 6.00 mol of O2?
3.00 g
320. g
2.00 g
4.00 g
240. g
Tro IC3
8.17
1.
2.
3.
4.
5.
What is the theoretical yield of SO3 from the
combustion of 3.00 mol of S and 6.00 mol of O2?
3.00 g
320. g
2.00 g
4.00 g
240. g
Tro IC3
8.18
1.
2.
3.
4.
5.
Tro IC3
What is the theoretical yield of MgO from the
combustion of 5.25 x 1023 atoms of Mg and
4.69 x 1023 molecules of O2?
35.1
2.17 x 1025
31.4
3.78 x 1025
62.8
g
g
g
g
g
8.18
1.
2.
3.
4.
5.
Tro IC3
What is the theoretical yield of MgO from the
combustion of 5.25 x 1023 atoms of Mg and
4.69 x 1023 molecules of O2?
35.1
2.17 x 1025
31.4
3.78 x 1025
62.8
g
g
g
g
g
8.19
1.
2.
3.
4.
5.
Tro IC3
Which reactant is in excess from the reaction of
35.0 g of hydrogen with 276 g of oxygen to form
water?
H
O
O2
H2
H2O
8.19
1.
2.
3.
4.
5.
Tro IC3
Which reactant is in excess from the reaction of
35.0 g of hydrogen with 276 g of oxygen to form
water?
H
O
O2
H2
H2O
8.20
Which of the following statements is NOT correct
about the limiting reactant in a reaction?
1. It has the lowest mass.
2. Its coefficient in the balanced equation is the
smallest one.
3. It has the highest mass.
4. It doesn’t react completely.
5. All of the above
Tro IC3
8.20
Which of the following statements is NOT correct
about the limiting reactant in a reaction?
1. It has the lowest mass.
2. Its coefficient in the balanced equation is the
smallest one.
3. It has the highest mass.
4. It doesn’t react completely.
5. All of the above
Tro IC3
8.21
1.
2.
3.
4.
5.
Tro IC3
In the combustion of a sample of methane, the
theoretical yield is 28.9 g CO2. When a chemistry
student performed the experiment, the yield was
26.4 g CO2. What is the percent yield of their
reaction by the student?
100. %
91.3 %
109 %
85.2 %
55.9 %
8.21
1.
2.
3.
4.
5.
Tro IC3
In the combustion of a sample of methane, the
theoretical yield is 28.9 g CO2. When a chemistry
student performed the experiment, the yield was
26.4 g CO2. What is the percent yield of their
reaction by the student?
100. %
91.3 %
109 %
85.2 %
55.9 %
8.22
An experiment had a percent yield of 91.8% and a
calculated theoretical yield of 28.2 g. How many
grams were actually produced?
1.
2.
3.
4.
5.
Tro IC3
25.9 g
2.50 g
92.0 g
28.5 g
30.7 g
8.22
An experiment had a percent yield of 91.8% and a
calculated theoretical yield of 28.2 g. How many
grams were actually produced?
1.
2.
3.
4.
5.
Tro IC3
25.9 g
2.50 g
92.0 g
28.5 g
30.7 g
8.23
1.
2.
3.
4.
5.
Tro IC3
What is the limiting reactant for the reaction
between 18.2 g of K and 8.38 g of water in the
following unbalanced reaction:
K + H2O → KOH + H2?
K
H2O
KOH
H2
Both are
used up at
the same
time.
8.23
1.
2.
3.
4.
5.
Tro IC3
What is the limiting reactant for the reaction
between 18.2 g of K and 8.38 g of water in the
following unbalanced reaction:
K + H2O → KOH + H2?
K
H2O
KOH
H2
Both are
used up at
the same
time.
8.24
1.
2.
3.
4.
5.
Tro IC3
5.0 kg of hydrogen is reacted with 31 kg of oxygen.
The experiment yields 28 kg of water. Calculate
the percent yield of the reaction.
40. %
63 %
80. %
90. %
161%
8.24
1.
2.
3.
4.
5.
Tro IC3
5.0 kg of hydrogen is reacted with 31 kg of oxygen.
The experiment yields 28 kg of water. Calculate
the percent yield of the reaction.
40. %
63 %
80. %
90. %
161%
8.25
1.
2.
3.
4.
5.
Tro IC3
4.25 mol of Cl2 are reacted with 1.49 mol NaOH.
12.5 g of NaClO3 are produced. Calculate the
percent yield of the following reaction:
3Cl2 + 6 NaOH → 5 NaCl + NaClO3 + 3H2O.
28.1%
47.3%
79.9%
82.8%
91.2%
8.25
1.
2.
3.
4.
5.
Tro IC3
4.25 mol of Cl2 are reacted with 1.49 mol NaOH.
12.5 g of NaClO3 are produced. Calculate the
percent yield of the following reaction:
3Cl2 + 6 NaOH → 5 NaCl + NaClO3 + 3H2O.
28.1%
47.3%
79.9%
82.8%
91.2%