At 28.0°C, the vapor pressure of n-propyl 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 100.0 g of C3H7SH and 100.0 g CH3CN, if Raoult's Law is obeyed?
A) 35.7 torr
B) 128 torr
C) 139 torr
D) 149 torr
E) 277 torr
Correct Answer:
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