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

### Question Asked by a Student from EXXAMM.com Team

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

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

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