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# 100 g of liquid A (molar mass 140 g $mo1^{-1}$) was dissolved in 1000 g of liquid B (molar mass 180 g $mol^{-1}$). The vapour pressure of pure liquid B was found to be 500 torr. What will be the vapour pressure of pure liquid A and its vapour pressure in the solution respectively if the total vapour pressure of the solution is 475 torr?

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