Q.The vapor pressure of pure benzene at a certain temperature is $640 \text{ mm Hg}$ . A non-volatile solid weighing $2.175 \text{ g}$ is added to $39.0 \text{ g}$ of benzene. The vapor pressure of the solution is $600 \text{ mm Hg}$ . The molecular weight of the solid substance is:

69.6 \text{ g/mol}

65.2 \text{ g/mol}

55.0 \text{ g/mol}

75.0 \text{ g/mol}

The correct solution involves applying the fundamental concept to derive the final value step by step...

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