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The vapour pressure of pure benzene C(6)...

The vapour pressure of pure benzene `C_(6)H_(6)` at `50^(@)C` is `268 "torr"`. How many moles of non-volatile solute per mole of benzene is required to prepare a solution of benzene having a vapour pressure of `167 "torr"` at `50^(@)C`?

A

0.305 mol

B

0.605 mol

C

0.336 mol

D

0.663 mol

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The correct Answer is:
B
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