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What is the composition of the vapour wh...

What is the composition of the vapour which is in equilibrium at `30@C` with a benzene-toluene solution with a mole fraction of benzene of (a) `0.400` and (b) `0.600`?
`P_(b)@ = 119` torr ,`P_(t)@ = 37.0` torr

A

0.237

B

0.367

C

0.428

D

0.318

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