2026 UPDATED QUESTIONS DOWNLOAD
CHM113 FINAL EXAM 2026/2027
QUESTIONS AND ANSWERS 100% PASS
This comprehensive study guide features 100 high-yield multiple-choice
questions covering every major unit of the General Chemistry I (CHM 113) curriculum.
Each question includes a detailed rationale in italics to explain the underlying chemical
principles and help you avoid common pitfalls. It is the perfect resource for final exam
preparation, focusing on stoichiometry, bonding, thermochemistry, and laboratory
safety.
1. How many significant figures are in the measurement 0.005080 grams?
A. 3
B. 4
C. 6
D. 7
• Answer: B
• Rationale: Leading zeros are never significant. Captive zeros (between non-
zeros) and trailing zeros after a decimal point are significant (5, 0, 8, 0).
2. An atom has 15 protons, 16 neutrons, and 18 electrons. What is the identity of
this particle?
A. Phosphorus-31 atom
B. Sulfur-32 ion
C. Phosphorus-31 ion (
)
D. Gallium-15 ion
• Answer: C
• Rationale: The number of protons (15) identifies it as Phosphorus. The mass
number is 15+16=31. Since it has 3 more electrons than protons, it has a 3-
charge.
,2026 UPDATED QUESTIONS DOWNLOAD
3. Which of the following is a "Strong Electrolyte"?
A.
(Methanol)
B.
(Hydrofluoric acid)
C.
(Hydrochloric acid)
D.
(Ammonia)
• Answer: C
• Rationale: Strong electrolytes completely dissociate in water.
is one of the seven strong acids.
and
are weak, and methanol is a non-electrolyte.
4. What is the molar mass of Calcium Nitrate,
?
A. 102.1 g/mol
B. 164.1 g/mol
C. 150.1 g/mol
D. 204.2 g/mol
• Answer: B
• Rationale: Ca (40.08) + 2
,2026 UPDATED QUESTIONS DOWNLOAD
N (14.01) + 6
O (16.00) = 164.1 g/mol.
5. How many moles of
are in 54.0 grams of Aluminum?
A. 1.0 mol
B. 2.0 mol
C. 3.0 mol
D. 0.5 mol
• Answer: B
• Rationale:
.
.
6. In the reaction
, if you start with 2 moles of
and 2 moles of
, which is the limiting reactant?
A.
B.
C.
D. Neither
, 2026 UPDATED QUESTIONS DOWNLOAD
• Answer: A
• Rationale: 2 moles of
requires only 1 mole of
to react completely. Since you have 2 moles of
, the
will run out first.
7. What is the oxidation state of sulfur in the sulfate ion,
?
A. +4
B. +6
C. -2
D. 0
• Answer: B
• Rationale:
is usually -2.
(net charge).
.
8. Which gas law describes the relationship between Volume and Temperature at
constant pressure?
CHM113 FINAL EXAM 2026/2027
QUESTIONS AND ANSWERS 100% PASS
This comprehensive study guide features 100 high-yield multiple-choice
questions covering every major unit of the General Chemistry I (CHM 113) curriculum.
Each question includes a detailed rationale in italics to explain the underlying chemical
principles and help you avoid common pitfalls. It is the perfect resource for final exam
preparation, focusing on stoichiometry, bonding, thermochemistry, and laboratory
safety.
1. How many significant figures are in the measurement 0.005080 grams?
A. 3
B. 4
C. 6
D. 7
• Answer: B
• Rationale: Leading zeros are never significant. Captive zeros (between non-
zeros) and trailing zeros after a decimal point are significant (5, 0, 8, 0).
2. An atom has 15 protons, 16 neutrons, and 18 electrons. What is the identity of
this particle?
A. Phosphorus-31 atom
B. Sulfur-32 ion
C. Phosphorus-31 ion (
)
D. Gallium-15 ion
• Answer: C
• Rationale: The number of protons (15) identifies it as Phosphorus. The mass
number is 15+16=31. Since it has 3 more electrons than protons, it has a 3-
charge.
,2026 UPDATED QUESTIONS DOWNLOAD
3. Which of the following is a "Strong Electrolyte"?
A.
(Methanol)
B.
(Hydrofluoric acid)
C.
(Hydrochloric acid)
D.
(Ammonia)
• Answer: C
• Rationale: Strong electrolytes completely dissociate in water.
is one of the seven strong acids.
and
are weak, and methanol is a non-electrolyte.
4. What is the molar mass of Calcium Nitrate,
?
A. 102.1 g/mol
B. 164.1 g/mol
C. 150.1 g/mol
D. 204.2 g/mol
• Answer: B
• Rationale: Ca (40.08) + 2
,2026 UPDATED QUESTIONS DOWNLOAD
N (14.01) + 6
O (16.00) = 164.1 g/mol.
5. How many moles of
are in 54.0 grams of Aluminum?
A. 1.0 mol
B. 2.0 mol
C. 3.0 mol
D. 0.5 mol
• Answer: B
• Rationale:
.
.
6. In the reaction
, if you start with 2 moles of
and 2 moles of
, which is the limiting reactant?
A.
B.
C.
D. Neither
, 2026 UPDATED QUESTIONS DOWNLOAD
• Answer: A
• Rationale: 2 moles of
requires only 1 mole of
to react completely. Since you have 2 moles of
, the
will run out first.
7. What is the oxidation state of sulfur in the sulfate ion,
?
A. +4
B. +6
C. -2
D. 0
• Answer: B
• Rationale:
is usually -2.
(net charge).
.
8. Which gas law describes the relationship between Volume and Temperature at
constant pressure?
