When 238. mg of a certain molecular compound X are dissolved in 90.0 g of benzonitrile (CHCN), the freezing point of the solution is measured to be -13.0 °C. Calculate the molar mass of X. If you need any additional information on benzonitrile, use only what you find in the ALEKS Data resource. Also, be sure your answer has a unit symbol, and is rounded to 1 significant digit. 0 8 0.2 Xx G

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Chapter10: Properties Of Solutions
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When 238. mg of a certain molecular compound X are dissolved in 90.0 g of benzonitrile (C,H,CN), the freezing point of the solution is measured to be
-13.0 °C. Calculate the molar mass of X.
If you need any additional information on benzonitrile, use only what you find in the ALEKS Data resource. Also, be sure your answer has a unit symbol, and is
rounded to 1 significant digit.
0
name
acetic acid
aluminum
ammonia
argon
benzene
benzonitrile
biphenyl
name
acetic acid
benzene
benzonitrile
9 0.9
0.0
X
chemical
formula
CH3CO₂H
Al
NH3
Ar
C6H6
CH₂CN
C12H10
chemical
formula
CH3CO₂H
C6H6
C6H5CN
melting
point
(Tm)
°C
17.0
660.323
-77.65
-189.34
5.538
-12.82
68.93
boiling
point (Tb)
°C
117.9
2519
-33.33
-185.848
80.08
191
255.2
melting
point (Tm)
°C
17.0
5.538
-12.82
specific
heat
capacity
(c) at 25
°℃
J-g-1.°C-1
2.053
0.897
35.1
0.52
1.741
1.602
1.287
boiling
point (T₂)
°C
117.9
80.08
191
heat of
fusion
(AHfus)
kJ.mol-¹
11.73
10.71
5.66
1.18
9.87
9.1
18.57
heat of
vaporization
(AHvap)
kJ.mol-¹
23.7
294
23.33
6.43
30.72
45.9
molal freezing point
depression constant
(K₂)
°C.kg.mol-¹
3.63
5.07
5.35
critical
temp
°C
320
6427
132.41
-122.463
289
418
499.85
critical
pressure
atm
57.1
112.08
47.99
48.4
41.6
33.9
molal boiling point
elevation constant
(Kb)
°C.kg.mol-¹
3.22
2.64
Transcribed Image Text:When 238. mg of a certain molecular compound X are dissolved in 90.0 g of benzonitrile (C,H,CN), the freezing point of the solution is measured to be -13.0 °C. Calculate the molar mass of X. If you need any additional information on benzonitrile, use only what you find in the ALEKS Data resource. Also, be sure your answer has a unit symbol, and is rounded to 1 significant digit. 0 name acetic acid aluminum ammonia argon benzene benzonitrile biphenyl name acetic acid benzene benzonitrile 9 0.9 0.0 X chemical formula CH3CO₂H Al NH3 Ar C6H6 CH₂CN C12H10 chemical formula CH3CO₂H C6H6 C6H5CN melting point (Tm) °C 17.0 660.323 -77.65 -189.34 5.538 -12.82 68.93 boiling point (Tb) °C 117.9 2519 -33.33 -185.848 80.08 191 255.2 melting point (Tm) °C 17.0 5.538 -12.82 specific heat capacity (c) at 25 °℃ J-g-1.°C-1 2.053 0.897 35.1 0.52 1.741 1.602 1.287 boiling point (T₂) °C 117.9 80.08 191 heat of fusion (AHfus) kJ.mol-¹ 11.73 10.71 5.66 1.18 9.87 9.1 18.57 heat of vaporization (AHvap) kJ.mol-¹ 23.7 294 23.33 6.43 30.72 45.9 molal freezing point depression constant (K₂) °C.kg.mol-¹ 3.63 5.07 5.35 critical temp °C 320 6427 132.41 -122.463 289 418 499.85 critical pressure atm 57.1 112.08 47.99 48.4 41.6 33.9 molal boiling point elevation constant (Kb) °C.kg.mol-¹ 3.22 2.64
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