Diethyl Ether Has a Vapor Pressure of 400

question 123

Multiple Choice

Diethyl ether has a vapor pressure of 400.0 torr at 18°C. When a sample of benzoic acid is dissolved in ether, the vapor pressure of the solution is 342 torr. What is the mole fraction of benzoic acid in the solution?

• A) 0.0169
• B) 0.0197
• C) 0.145
• D) 0.855
• E) 0.045

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