At 280°C, the Vapor Pressure of Npropyl Mercaptan, C₃H₇SH, Is 175

Multiple Choice

At 28.0°C, the vapor pressure of npropyl mercaptan, C₃H₇SH, is 175 torr, while that of acetonitrile, CH₃CN, is 102 torr. What is the vapor pressure, at 28.0°C, of a solution made by mixing 120.0 g of C₃H₇SH and 80.0 g CH₃CN, if Raoult's Law is obeyed?Hint: Organizing the given information into moles and mole fraction of each component will help in solving this problem.

A) 131 torr
B) 135 torr
C) 142 torr
D) 146 torr
E) 277 torr