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

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

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