What is the mole fraction of acetone, C3H6O, in the vapor phase from a solution consisting of a mixture of acetone and ethyl acetate, CH3COOCH2CH3, at 30.00 °C, if the total pressure above the solution is 184.6 torr? The vapor pressures of pure acetone and ethyl acetate at 30.00 °C are 285.0 torr and 118.0 torr, respectively.