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a solution contains a mixture of pentane and hexane at room temperature. the solution has a vapor pressure of 268 torr. pure pentane and hexane

a solution contains a mixture of pentane and hexane at room temperature. the solution has a vapor pressure of 268 torr. pure pentane and hexane have vapor pressures of 425 torr and 151 torr, respectively, at room temperature. what is the mole fraction of hexane? (assume ideal behavior)

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