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water has a vapour pressure of 23.76 torr at 25C.what is the vapour pressure of a solution of sucrose ,if its mole fraction is 0.25?

  • chemistry -

    I assume you mean Xsucrose = 0.25 which makes XH2O = 0.75.
    Then Psoln = XH2O*Ponormal
    Psoln (in torr) = 0.75*23.76

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