CHEM 121 FINAL EXAM - COMPLETE QUESTIONS AND
DETAILED SOLUTIONS LATEST UPDATE THIS YEAR JUST
RELEASED
Question 1: According to the law of conservation of matter, which
of the following may NEVER occur as a result of a chemical
reaction
A. creation of new chemical species.
B. reaction of starting materials
C. rearranged to form new substances
D. reduction in total mass
Answer:
d. reduction in total mass
Question 2: What is the oxidation number of Mn in KMnO4?
A. +9
B. +5
C. +7
D. +4
Answer:
c. +7
Question 3: What is the oxidation number of Cl in HClO3?
A. +2
B. +3
C. +4
D. +5
Answer:
, d. +5
Question 4: A pressure is recorded as 622 torr. What is this
pressure in atm?
A. 1.22
B. 0.818
C. 5.17
D. 0.0393
Answer:
b. 0.818
Question 5: Using d = m/V, what is the (V)olume of a solid that has
a density is 3.14g/cm3 and has a mass of 7.04 grams?
A. 22.1 cm3
B. 22.11 cm3
C. 2.24 cm3
D. 2.242 cm3
Answer:
c. 2.24 cm3
Question 6: Increasing the pressure on a gas at constant
temperature does what to the volume of the gas?
A. increases it
B. decreases it
C. has no effect on it
D. increases it up to a certain point
Answer:
, b. decreases it
Question 7: Convert a temperature of 45°C into Kelvins.
A. -45 K
B. -228 K
C. 228 K
D. 318 K
Answer:
d. 318 K
Question 8: The temperature of a liquid is decreased. What
happens to the vapor pressure of the liquid as a result?
A. it increases
B. it decreases
C. it is not changed
D. it increases or decreases depending on how large a temperature
change occurs
Answer:
b. it decreases
Question 9: A 5.00 liter gas sample is collected at a temperature
and pressure of 27.0°C and 1.20 atm. It is desired to transfer the
gas to a 3.00 liter container at a pressure of 1.00 atm. What must be
the temperature of the gas in the 3.00 liter container?
A. 216 K
B. 417 K
C. 13.5?C
D. 150 K
, Answer:
d. 150 K
Question 10: In which of the following processes does the energy
of the water increase?
A. water freezes
B. steam condenses to liquid
C. water evaporates
D. more than one response is correct
Answer:
c. water evaporates
Question 11: When steam condenses, it absorbs heat.
A. True
B. False
Answer:
b. False
Question 12: Moving water to a point 1500 meters higher that you
are at now will have what effect on its boiling point?
A. increase it
B. lower it
C. will have no effect
D. too little information to know
Answer:
b. lower it
DETAILED SOLUTIONS LATEST UPDATE THIS YEAR JUST
RELEASED
Question 1: According to the law of conservation of matter, which
of the following may NEVER occur as a result of a chemical
reaction
A. creation of new chemical species.
B. reaction of starting materials
C. rearranged to form new substances
D. reduction in total mass
Answer:
d. reduction in total mass
Question 2: What is the oxidation number of Mn in KMnO4?
A. +9
B. +5
C. +7
D. +4
Answer:
c. +7
Question 3: What is the oxidation number of Cl in HClO3?
A. +2
B. +3
C. +4
D. +5
Answer:
, d. +5
Question 4: A pressure is recorded as 622 torr. What is this
pressure in atm?
A. 1.22
B. 0.818
C. 5.17
D. 0.0393
Answer:
b. 0.818
Question 5: Using d = m/V, what is the (V)olume of a solid that has
a density is 3.14g/cm3 and has a mass of 7.04 grams?
A. 22.1 cm3
B. 22.11 cm3
C. 2.24 cm3
D. 2.242 cm3
Answer:
c. 2.24 cm3
Question 6: Increasing the pressure on a gas at constant
temperature does what to the volume of the gas?
A. increases it
B. decreases it
C. has no effect on it
D. increases it up to a certain point
Answer:
, b. decreases it
Question 7: Convert a temperature of 45°C into Kelvins.
A. -45 K
B. -228 K
C. 228 K
D. 318 K
Answer:
d. 318 K
Question 8: The temperature of a liquid is decreased. What
happens to the vapor pressure of the liquid as a result?
A. it increases
B. it decreases
C. it is not changed
D. it increases or decreases depending on how large a temperature
change occurs
Answer:
b. it decreases
Question 9: A 5.00 liter gas sample is collected at a temperature
and pressure of 27.0°C and 1.20 atm. It is desired to transfer the
gas to a 3.00 liter container at a pressure of 1.00 atm. What must be
the temperature of the gas in the 3.00 liter container?
A. 216 K
B. 417 K
C. 13.5?C
D. 150 K
, Answer:
d. 150 K
Question 10: In which of the following processes does the energy
of the water increase?
A. water freezes
B. steam condenses to liquid
C. water evaporates
D. more than one response is correct
Answer:
c. water evaporates
Question 11: When steam condenses, it absorbs heat.
A. True
B. False
Answer:
b. False
Question 12: Moving water to a point 1500 meters higher that you
are at now will have what effect on its boiling point?
A. increase it
B. lower it
C. will have no effect
D. too little information to know
Answer:
b. lower it
