The partial molar volumes of ethanol and water at the 25 degrees C are 57 and 17 cm^3 /mol for a solution having a composition Xh2o = 0.6. Determine the amount in mL of ethanol that must be added to one liter or water to achieve a solution with this composition and estimate the Vmix The densities of pure water and ethanol at this temperature are 0.997 and .789 g cm^-3