Acetone (Mw = 58

question 3

Multiple Choice

Acetone (mw = 58.08, P25 C=232 mmHg) and butanone (mw = 72.11, P 25 C=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) More information needed
• E) None of the above

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