At 25 degrees celcius, 1 mol of A having Vapour pressure of 100 torr and 1 mol of B Having a vapor pressure of 300 torr were mixed. The vapour at equillibrium is removed, condensed and the condensate is heated back to 25 degrees celsius. The vapour now formed are again removed,recondensed and analysed. What is the mole fraction of A in this condensate?

Dear student,

Use the formula,

Po-P/Po=n2/n1

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