When 184. mg of a certain molecular compound X are dissolved in 85. g of formamide (NH,COH), the freezing point of the solution is measured to be 1.7 °C. Calculate the molar mass of X. If you need any additional information on formamide, use only what you find in the ALEKS Data resource. Also, be sure your answer has a unit symbol, and is rounded to the correct number of significant digits. olo
When 184. mg of a certain molecular compound X are dissolved in 85. g of formamide (NH,COH), the freezing point of the solution is measured to be 1.7 °C. Calculate the molar mass of X. If you need any additional information on formamide, use only what you find in the ALEKS Data resource. Also, be sure your answer has a unit symbol, and is rounded to the correct number of significant digits. olo
Chemistry
10th Edition
ISBN:9781305957404
Author:Steven S. Zumdahl, Susan A. Zumdahl, Donald J. DeCoste
Publisher:Steven S. Zumdahl, Susan A. Zumdahl, Donald J. DeCoste
Chapter1: Chemical Foundations
Section: Chapter Questions
Problem 1RQ: Define and explain the differences between the following terms. a. law and theory b. theory and...
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Transcribed Image Text:When 184. mg of a certain molecular compound X are dissolved in 85. g of formamide (NH,COH ), the freezing point of the solution is measured to be 1.7 °C.
Calculate the molar mass of X.
If you need any additional information on formamide, use only what you find in the ALEKS Data resource. Also, be sure your answer has a unit symbol, and is
rounded to the correct number of significant digits.
Ox10
미
Transcribed Image Text:molal boiling point
melting
point
(Tm)
boiling
point
(Ть)
°C
molal freezing point
depression constant (Kf)
elevation constant
name
chemical formula
(К»)
°C
°C-kg-mol-1
°C-kg-mol-1
acetic acid
CH3CO2H
17.0
117.9
3.63
3.22
benzene
C6H6
5.538
80.08
5.07
2.64
benzonitrile
C6H5CN
-12.82
191
5.35
carbon
CS2
-111.7
46.2
2.42
disulfide
carbon
CI4
-22.8
76.7
5.26
tetrachloride
cyclohexane
C6H12
6.7
80.7
20.8
2.92
dibenzyl
ether
(C6H5CH2)20
1.8
298
6.17
diethyl
ether
CH3CH20CH2CH3
-116.22
34.4
2.2
ethanol
CH3CH2OH
-114.14
78.24
1.23
ethylene
glycol
(CH2OH)2
-13.0
197.5
3.11
2.26
formamide
NH2COH
2.57
217
4.25
hexane
C6H14
-95.27
68.72
2.9
methanol
CH3OH
-97.5
64.5
2.9
naphthalene
C10H8
80.22
218
7.45
water
H20
99.974
1.86
0.513
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