Calculate the molality of the solution, if the vapour pressure of pure benzene is `639.70` mm of Hg and the vapour press

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Q 1210191019.     Calculate the molality of the solution, if the vapour pressure of pure benzene is `639.70` mm of Hg and the vapour pressure of solution of a solute in benzene at the same temperature is `631.9` mm of Hg.
A

`m = 1.580` mol/kg

B

`m = 15. 80` mol/kg

C

`m = 0.358` mol/kg

D

`m = 0.158` mol/kg

HINT

Use `(p−p_s)/p=n/N`

Solution
(Provided By a Student and Checked/Corrected by EXXAMM.com Team)

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