The vapor pressure of pure hexane and pentane at 25 C are 149.1 mmHg and 508.5 mmHg,

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Question:

The vapor pressure of pure hexane and pentane at 25 °C are 149.1 mmHg and 508.5 mmHg, respectively. If a hexane-pentane solution has a mole fraction of hexane of 0.750, what are the vapor pressures of hexane and pentane above the solution? What is the total vapor pressure?