Question

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The vapour pressure of benzene at a certain temperature is 640 mm Hg. A non volatile non electrolyte solid weighing 2.175g is added to 39.0g of benzene. The vapour pressure of the solution is 600 mm Hg. What is the molecular weight of the solid substance ?
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Answer 1

Answer:

The vapour pressure of benzene at a certain temperature is 640 mm of Hg. The vapour pressure of benzene at a certain temperature is 640 mm of Hg. When a nonvolatile and non-electrolyte solid weighing 2.175 g is added to 39.08 g of benzene, the vapour pressure of the solution becomes 600 mm of Hg.

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