At 25C the vapour pressure of pure pentane is 511 torr and that of hexane is 150. torr.

At 25°C the vapour pressure of pure pentane is 511 torr and that of hexane is 150. torr.1What is the mole fraction of pentane in a pentane-hexane solution that has a vapour pressure of 287 torr at 25°C? 2What is the mole fraction of hexane in the vapour that is in equilibrium with this solution?(Assume ideal gas behaviour.)