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What is the vapor pressure of the solvent

in an aqueous solution at 25◦C of 0.29 m (molality) urea(CO(NH2)2), a nonelectrolyte? The vapor pressure of water at 25◦C is 23.76 Torr.
Answer in units of Tor

I want to use the mole fraction and multiply it by VP and add the two VP, but I don't know what to do with the molality so that's its useful..

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