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A 0.400-g sample of an unknown compound is dissolved in 20.0 mL of cyclohexane (density = 0.779 g/mL), and the solution has a freezing point of 4.3°C. Pure cyclohexane has a freezing point of 6.8°C and a freezing point depression constant, K = 20.5 °C•kg/mol. Calculate the molar mass of the compound.

A 0.400-g sample of an unknown compound is dissolved in 20.0 mL of cyclohexane (density = 0.779 g/mL), and the solution has a freezing point of 4.3°C. Pure cyclohexane has a freezing point of 6.8°C and a freezing point depression constant, K = 20.5 °C•kg/mol. Calculate the molar mass of the compound.

General Chemistry - Standalone book (MindTap Course List)
General Chemistry - Standalone book (MindTap Course List)
11th Edition
ISBN:9781305580343
Author:Steven D. Gammon, Ebbing, Darrell Ebbing, Steven D., Darrell; Gammon, Darrell Ebbing; Steven D. Gammon, Darrell D.; Gammon, Ebbing; Steven D. Gammon; Darrell
Publisher:Steven D. Gammon, Ebbing, Darrell Ebbing, Steven D., Darrell; Gammon, Darrell Ebbing; Steven D. Gammon, Darrell D.; Gammon, Ebbing; Steven D. Gammon; Darrell
Chapter12: Solutions
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Problem 12.108QP: Analysis of a compound gave 39.50% C, 2.21% H, and 58.30% Cl. When 0.855 g of this solid was...
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A 0.400-g sample of an unknown compound is dissolved in 20.0 mL of cyclohexane (density = 0.779 g/mL), and the solution has a freezing point of 4.3°C. Pure cyclohexane has a freezing point of 6.8°C and a freezing point depression constant, Kf = 20.5 °C-kg/mol. Calculate the molar mass of the compound.
Transcribed Image Text:A 0.400-g sample of an unknown compound is dissolved in 20.0 mL of cyclohexane (density = 0.779 g/mL), and the solution has a freezing point of 4.3°C. Pure cyclohexane has a freezing point of 6.8°C and a freezing point depression constant, Kf = 20.5 °C-kg/mol. Calculate the molar mass of the compound.
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