The vapor pressure of pure water at 25 c is 238 torr a, Ask an Expert

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The vapor pressure of pure water at 25 C is 23.8 torr. A solution is made by mixign 36.38 g of unknown non ionic substance into 250.00 g of water and the vapor pressure of the solution is found to be 23.1 torr. What is the molecular weight of the solution?

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