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A mixture of benzene and toluene contain...

A mixture of benzene and toluene contains 30% by mass of toluene. At `30^@C`, vapour pressure of pure toluene is 36.7mm Hg and that of pure benzene is 118.2 mm Hg. Assuming that the two liquids form ideal silutions, calculate that total pressure and partial pressur eof each constituent above the solution at `30^@C`.

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