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The total pressure observed by mixing tw...

The total pressure observed by mixing two liquids A and B is `350mmHg` when their mole fractions are `0.7` and `0.3` respectively The total pressure becomes `4.10mmHg` if the mole fractions are changed to `0.2` and `0.8` respectively for A and B.The vapour pressure of pure A is Consider the liquids and solutions behave ideally.

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