CHEM116 Copy of Final Practice Exam Questions and Answers Spring 2026

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Chem 116 Final Exam Review Sheet PV = NRT

=
soluteae
tmole
Chapter
⑮I업] P1tKe 10
?
. II molality


σ
1. The National Weather Service routinely supplies atmospheric pressure data to help pilots
set their altimeters. The units the NWS uses for atmospheric pressure are inches of
mercury. A barometric pressure of 30.51 inches of mercury corresponds to
kPa. P dgh =
29 92 in
A. 16.01 1 atm =

Ag .




B. 775 latm 101 . 325 kPa . 38639kPa
linHg 3
=
=



g C. 103.3
3 38039
ka
103 . 3 kPa
=
D. 77.50 30 51 inHg ×
,




1 Hg
.




E. 1.020
2. A sample of gas (24.2 g) initially at 4.00 atm was compressed from 8.00 L to 2.00 L at
_
_



constant temperature. After the compression, the gas pressure was atm.
A. 1.00 P V PiVi
,
=




a
(
B. 16.00
C. 2.00 (4 00 atm) ( 8 00λ= ( Pc ) (2 00 l)
.
,
,




D. 4.00
E. 8.00
3. A balloon originally had a volume of 4.39 L at 44 °C and a pressure of 729 torr. The
balloon must be cooled to °C to reduce its volume to 3.78 L (at constant
pressure).


=…
A. 38
B. 0
G C. 273
D. 546 的
E. 72.9
4. The amount of gas that occupies 60.82 L at 31 °C and 367 mmHg is mol.
A. 11.7 PV NRT =

い ℃ )( 60. 87 ) = ( 0 08200) (
. 304 15) n .




σ B. 1.18 4 347 =

mmHg amHy 48 atm
29 1936
= 0 .
n24. 958549 .
=



C. 0.850 n 1 l 7 =
.




D. 894 T 31= 273 15
+ 304 S k
.
=
.
1


E. 0.120
5. At a temperature of °C, 0.444 mol of CO gas occupies 11.8 L at 889 torr.
A. 106
B. 379
C. 32
D. 73
E. 14
6. A sample of gas (1.9 mol) is in a flask at 21 °C and 697 mmHg. The flask is opened and
more gas is added to the flask. The new pressure is 795 mmHg and the temperature is
now 26 °C. There are now mol of gas in the flask.
A. 0.28
B. 2.1
C. 1.6




齒

, D. 3.5
E. 2.9 NOz
7. The mass of nitrogen dioxide contained in a 4.32 L vessel at 48 °C and 141600 Pa is
g. NRt 23 m 014
PV
= 10 58g
= 。
.




4
A. 5.35 × 10 P
B. 9.46 × 10-2
141400 Pax
=
2 gx 10 SPa
4 Oatm
=
に




( 0 08200 ( 321
. 18)
θC. 10.5 ( 4 . 32 ) = . )
40
( ] n

48 273 321 . 15k+ . 15 =
T
n(26 35)
=
.
D. 70.5 . 048
6 =




E. 53.5 23 n =




8. The molecular weight of a gas that has a density of 7.10 g/L at 25.0 °C and 1.00 atm
pressure is g/mol. d = M
=
A. 28.0
7 60) (0 08206) (298 )
15
B. 5.75 × 10-3
.
.

= .




PV nRT =


C. 14.6 709 173
=

.




A
D.
6.85 × 10 -2
d .
RT
=
AN 머쯤
O E. 174 He
9. The volume of hydrogen gas at 38.0 °C and 763 torr that can be produced by the reaction
ー




of 4.33 g of zinc with excess sulfuric acid is L. steps :

mol
① gzn
-
>
-4
A. 2.71 × 10 zn(s)
HzS0y(a9) znSOy(aq) Hz(9)
+ -
> +
atm
② convert K
toor >
imol
-




B. 0.592 molzn +. 33g X55 mol
=
= 0 06623
389
.




. ℃ 5 →



C. 2.84 MRT PV =
③ plug PV nRT in
=




eD. 1.69 004 V
) = 10 1 (
( 0 08200} ( )
, 006233 . , 311 . 15


E. 3.69 × 104 V 1 68 = .




10. Ammonium nitrite undergoes thermal decomposition to produce only gases:
NH4NO2 (s) → N2 (g) + 2H2O (g)
_

What volume (L) of gas is produced by the decomposition of 35.0 g of NH4NO2 (s) at

Xmol 3m
e
525 ° C and 1.5 atm? 35. 0g X
A. 15 x , NHyNo
1 64ms =
.




σ B. 72 (1 . 5) v ( 64)(0 08206) (798 15)
=
.

. .




C. 160 1 3 √ .
107 ll = .




D. 24 √= F 1 6 し .




E. 47
11. In a gas mixture of He, Ne, and Ar with a total pressure of 8.40 atm, the mole fraction of
Ar is if the partial pressures of He and Ne are 1.50 and 2.00 atm,
respectively. 4 9 XAr ( 8 40) = .




A. 0.357
.




× 583 = 0
ar
.




B. 0.417 408
. 1. 50 2 00 - .9 -
.
= 4



∞ C. 0.583
D. 0.238
E. 0.179
12. The root-mean-square speed of CO at 113 °C is m/s.
A. 31.5
B. 317 Vrms Wo =




σ C. 586 R =8 31 서 .
惑弘 O8
=




D. 993 T 380 15 k 586 39
=
=


E. 58.3
.


.




M = . 01
28
glmd
=. 0280 kg/mol

, 13. A sample of O2 gas (2.0 mmol) effused through a pinhole in 5.0 s. It will take
s for the same amount of CO2 to effuse under the same conditions.
A. 0.23

⑨
B. 3.6
C. 5.9
告 無 =




⑦
D. 6.9 02 32g(ma
E. 4.3
=

晉
44 01g/mol E5
(02 = .



= 1 17.




ra


Chapter
翘 ]BEe ]]I11
1
筑 rr =
4 27
.




14. Based on molecular mass and dipole moment of the five compounds in the table below,
which should have the highest boiling point?




←
moment
I
>
- highest dipole

⑦
A. CH3CN
B. CH3CH2CH3
C. CH3OCH3
D. CH3Cl
E. CH3CHO
15. Of the following substances, only has London dispersion forces as its only
intermolecular force.
A. CH3OH
B. NH3
C. H2S
⑨ D. CH4
E. HCl
16. Which one of the following should have the lowest boiling point?
ㅐ , ,
* ,
A. PH3 H H H
B. H2S ㅣ
… " ↑
C. HCl H
⑨ D. SiH4 H C -



N
サーレー C C GGC
- -

-
-




E. H2O ㅣ

↓ ↓ . ↓
"
∞ 17. In which of the following
ㅐ molecules is hydrogen bonding likely to be the most significant
component of the total intermolecular
H H H forces?
시 시 H ㅣ
H H
A. CH4 ㅣ
ㅣ
ㅣ




B. C5H11OH H C
-

C CLCE O H
- - - -




C. C6H13NH2 1 1 "

① D. CH3OH H H i ↓ H

⑨ E. CO2
18. Of the following substances,
ㅐ only has hydrogen bonding.
ㅣ

H c o H c
o
-




0
- -

-
-




\

ㅐ