Calculate the molecular weight of the solid substance, if the vapour pressure of pure benzene at a certain temperature i

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Q 1220680511.     Calculate the molecular weight of the solid substance, if the vapour pressure of pure benzene at a certain temperature is `640 mm` Hg. And a non-volatile, non-electrolyte solid weighing `2.175 g` is added to `39.0 g` of benzene. The vapour pressure of the solution is `600 mm` Hg.
A

`65.25`

B

`56.25`

C

`6.525`

D

`5.625`

HINT

Use formula: `p = p_0x_1`

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

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