試題詳解

17. Acetone (mw = 58.08, = 232 mmHg) and butanone (mw = 72.11, = 100 mmHg) have the indicated molar masses and vapor pressures. A container holds 1.00 kg of butanone. How much acetone must be added to the butanone to elevate the total vapor pressure over the mixture to 125 mmHg at 25°C?
(A) 5.313 kg
(B) 290 g
(C) 188 g
(D) 288 g
(E) 94 g