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The vapour pressure of pure water at 25^...

The vapour pressure of pure water at `25^(@)"C"` is `23.76` torr. The vapour pressure of a solution containing `5.10` g of a nonvolatile substance in `90.0` g water is `23.32` torr. Compute the molecular weight of the solute.

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The correct Answer is:
55.08g/mol
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