A certain nonvolatile hydrocarbon that weighed 1.00 g was dissolved in 50.00 g of benzene. The resulting solution was boiled at 0.285 °C higher than the boiling point of pure benzene which boils at 80.1°C. Find the molar mass of the hydrocarbon. (Hint: See Table 1 for given constant.)

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Chapter1: Chemical Foundations
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Problem 1RQ: Define and explain the differences between the following terms. a. law and theory b. theory and...
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Problem Solving:
1. A solution is made of 2.00 g of sucrose, C12H22011, in water, H20. The molar
mass (MM) of sucrose is 342 g/mol. Calculate the (a) boiling point and (h)
freezing point of the solution. (Hint: See Table 1 for given constants.)
2. A certain nonvolatile hydrocarbon that weighed 1.00 g was dissolved in
50.00 g of benzene. The resulting solution was boiled at 0.285 °C higher
than the boiling point of pure benzene which boils at 80.1°C. Find the molar
mass of the hydrocarbon. (Hint: See Table 1 for given constant.)
14
Transcribed Image Text:Problem Solving: 1. A solution is made of 2.00 g of sucrose, C12H22011, in water, H20. The molar mass (MM) of sucrose is 342 g/mol. Calculate the (a) boiling point and (h) freezing point of the solution. (Hint: See Table 1 for given constants.) 2. A certain nonvolatile hydrocarbon that weighed 1.00 g was dissolved in 50.00 g of benzene. The resulting solution was boiled at 0.285 °C higher than the boiling point of pure benzene which boils at 80.1°C. Find the molar mass of the hydrocarbon. (Hint: See Table 1 for given constant.) 14
Table 1. Molal Freezing Point and Boiling Point Constants
Freezing Point
(C)
Solvent
Formula
Bolling Point
(*C)
(C/molal)
(c/molal)
Water
H20
0.0
1.86
100.0
0.51
Acetic acid CH:COOH 17.0
3.90
118.1
3.07
Benzene
5.5
4.90
80.2.
2.53
Chloroform CHC3
-63.5
4.68
61.2
3.63
Ethanol
C2H5OH
114.7
1.99
78.
78.4
1.22
7.40
181.0
3.56
Phenol
CeHsOH
43.0
Transcribed Image Text:Table 1. Molal Freezing Point and Boiling Point Constants Freezing Point (C) Solvent Formula Bolling Point (*C) (C/molal) (c/molal) Water H20 0.0 1.86 100.0 0.51 Acetic acid CH:COOH 17.0 3.90 118.1 3.07 Benzene 5.5 4.90 80.2. 2.53 Chloroform CHC3 -63.5 4.68 61.2 3.63 Ethanol C2H5OH 114.7 1.99 78. 78.4 1.22 7.40 181.0 3.56 Phenol CeHsOH 43.0
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