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Chemistry 8 Online
OpenStudy (anonymous):

HELP PLEASE! A solution contains 0.0115mol H2O and an unknown number of moles of sodium chloride. The vapour pressure of the solution at 30degrees is 25.7 Torr. The vapour pressure of pure water at 30degrees is 31.8 Torr. Calculate the number of moles of sodium chloride in the solution.

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