Question

Two liquid A and B form ideal solution At 300K, the vapour pressure of a solution containing 1mol of
A and 3mol of B is 500mm of Hg. At the same temperature, is one mole of B is added to this solution
the vapour pressure of the solution increases by 10 mm of Hg. Determine vapour pressure of A and
B in their pure states ?
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Answer 1

300 know?please give me