Two volatile substances, A and B are dissolved in one another and the resulting solution has a vapor pressure of 137 torr. If

Question

Two volatile substances, A and B are dissolved in one another and the resulting solution has a vapor pressure of 137 torr. If the mole fraction of B is 0.230 and the vapor pressure of pure B is 162 torr, what is the vapor pressure of pure A in torr?

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