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Vapor Pressure Problem An aq CaCl2 colution has a vapor pressure of 81.6 mmHg at 50 degrees C. The vapor pressure of pure water at this temperature is 92.6 mmHg. What is the concentration of CaCl2 in mass percent? I don't even know where to start, if I can use Raoult's Law or not . . .

Homework Statement To what volume shuould you dilute 125 mL of an 8.00 mL CuCl2 solution so that 50.0 mL of the diluted solution contains 5.9 g CuCl2? Homework Equations M= mol solute / vol solution (L) m = mol solute / mass solvent (kg) mole percent = mol solute / mol solute +...