At 25°C the vapour pressure of pure pentane is 511 torr and that of hexane is 150. torr. What is the mole fraction of pe

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At 25°C the vapour pressure of pure pentane is 511 torr and that
of hexane is 150. torr. What is the mole fraction of pentane in a
pentane-hexane solution that has a vapour pressure of 383 torr at
25°C? Answer 6.45×10-1
Question What is the mole fraction of hexane in the
vapour that is in equilibrium with this solution? (Assume ideal gas
behaviour.)
I tried 0.355 and 0.253 but these are incorrect. Please help me
with this question