Step 1: Calculate the number of moles of each gas present:
Molar mass CH3OH = mass C + mass H + mass O
Molar mass CH3OH = 12 g/mol + (1 g/mol x 4) + (16 g/mol) = 32 g/mol
The vapor pressure of methanol, CH3OH, is 94 torr at 20 °C. The vapor pressure of ethanol, C2H5OH, is 44 torr at the same temperature.
(a) Calculate the mole fraction of methanol and of ethanol in a solution of 50.0 g of methanol and 50.0 g of ethanol.
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