Methanol, CH3OH and ethanol, C2H5OH, form an ideal solution. The vapor pressure of pure ethanol is 56 torr. if a solution prepared from 560.0 g of methanol and 210.0 g of ethanol has a vapor pressure of .31 atm over the soultion. what is the vapor pressure of pure methanol (molar mass of ethanol =46.07 and of methanol = 32.04)