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Vapour pressure of pure benzene at a certain temperature is 640 mm Hg. A non-volatile non-electrolyte solid weighing 2.175g is added to 39.0 of benzene. The vapour pressure of solution is 600 mm Hg. What is the molecular mass of solid substance?

Vapour pressure of pure benzene at a certain temperature is 640 mm Hg. A
non-volatile non-electrolyte solid weighing 2.175g is added to 39.0 of benzene.
The vapour pressure of solution is 600 mm Hg. What is the molecular mass of
solid substance?

Grade:Upto college level

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