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Chemistry Forums for Students => Analytical Chemistry Forum => Topic started by: lazyndnkid on February 05, 2008, 11:37:29 PM

Title: Vapor pressure/ molar mass problem
Post by: lazyndnkid on February 05, 2008, 11:37:29 PM

When 10.5 g of an unknown, non-volatile, non-electrolyte, X was dissolved in 100. g of water, the vapor pressure of the solvent decreased from 23.8 torr to 23.3 torr at 298 K. Calculate the molar mass of the solute, X.

any help?

Title: Re: Vapor pressure/ molar mass problem
Post by: Borek on February 06, 2008, 02:59:30 AM

How vapor pressure change is related to number of moles of solute?