CHEM 121 FINAL EXAM ALL MODULES
2025/2026 BANK 2 VERSIONS QUESTIONS
AND ACCURATE ACTUAL EXAM WITH
FREQUENTLY TESTED QUESTIONS AND
STUDY GUIDE / EXPERTLY VERIFIED FOR
GUARANTEED PASS/ALREADY GRADED A+
Which of the following 3rd period elements has the
smallest atomic radius?
a. S
b. Cl
c. Na
d. Al - ....ANSWER...B
How many valence electrons are present in an atom of
carbon in the ground state?
a. 1
b. 8
c. 4
d. 2 - ....ANSWER...C
1
,A Ca+2 ion has an electron configuration similar to that
of
a. xenon.
b. neon.
c. argon.
d. krypton. - ....ANSWER...C
Which of the following bonds is most polar?
Electronegativity values: F=4.0, O=3.5,N=3.0,
Br=2.8, C=2.5.
a. O―F
b. N―F
c. Br―F
d. C―F - ....ANSWER...D
Which structure represents the best Lewis structure for
O2?
a. 6-4
b. 5-5
2
,c. 3---3
d. 4--4 - ....ANSWER...D
A pressure of 414 torr is equal to
a. 0.545 atm
b. 1.52 atm
c. 1.84 atm
d. 0.659 atm - ....ANSWER...A
A hot air balloon is filled to a volume of 44.5 L at 758
torr. What will be the volume of the balloon if the
pressure decreases to 748 torr under constant
temperature?
a. 43.9 L
b. 49.0 L
c. 45.1 L
d. 44.5 L - ....ANSWER...C
A sample of gas has a volume of 200. mL at 20.0 ° C.
What will be its volume at 40.0 °C, pressure remaining
constant?
3
, a. 100. mL
b. 400. mL
c. 18.8 mL
d. 214 mL - ....ANSWER...D
What is the volume of 0.132 mol of carbon dioxide gas
at STP?
a. 333 L
b. 2.96 L
c. 5.81 L
d. 170. L - ....ANSWER...B
The total number of molecules contained in 22.4 L of
nitrogen gas at STP is .
a. 6.023 × 10-23 molecules
b. 22.4 molecules
c. 6.023 × 1023 molecules
d. 1 molecule - ....ANSWER...C
At which pressure would a 2.60 mol sample of gas at
4
2025/2026 BANK 2 VERSIONS QUESTIONS
AND ACCURATE ACTUAL EXAM WITH
FREQUENTLY TESTED QUESTIONS AND
STUDY GUIDE / EXPERTLY VERIFIED FOR
GUARANTEED PASS/ALREADY GRADED A+
Which of the following 3rd period elements has the
smallest atomic radius?
a. S
b. Cl
c. Na
d. Al - ....ANSWER...B
How many valence electrons are present in an atom of
carbon in the ground state?
a. 1
b. 8
c. 4
d. 2 - ....ANSWER...C
1
,A Ca+2 ion has an electron configuration similar to that
of
a. xenon.
b. neon.
c. argon.
d. krypton. - ....ANSWER...C
Which of the following bonds is most polar?
Electronegativity values: F=4.0, O=3.5,N=3.0,
Br=2.8, C=2.5.
a. O―F
b. N―F
c. Br―F
d. C―F - ....ANSWER...D
Which structure represents the best Lewis structure for
O2?
a. 6-4
b. 5-5
2
,c. 3---3
d. 4--4 - ....ANSWER...D
A pressure of 414 torr is equal to
a. 0.545 atm
b. 1.52 atm
c. 1.84 atm
d. 0.659 atm - ....ANSWER...A
A hot air balloon is filled to a volume of 44.5 L at 758
torr. What will be the volume of the balloon if the
pressure decreases to 748 torr under constant
temperature?
a. 43.9 L
b. 49.0 L
c. 45.1 L
d. 44.5 L - ....ANSWER...C
A sample of gas has a volume of 200. mL at 20.0 ° C.
What will be its volume at 40.0 °C, pressure remaining
constant?
3
, a. 100. mL
b. 400. mL
c. 18.8 mL
d. 214 mL - ....ANSWER...D
What is the volume of 0.132 mol of carbon dioxide gas
at STP?
a. 333 L
b. 2.96 L
c. 5.81 L
d. 170. L - ....ANSWER...B
The total number of molecules contained in 22.4 L of
nitrogen gas at STP is .
a. 6.023 × 10-23 molecules
b. 22.4 molecules
c. 6.023 × 1023 molecules
d. 1 molecule - ....ANSWER...C
At which pressure would a 2.60 mol sample of gas at
4
