at 60 the vapor pressure of pure water is 149.44 mmhg and that above an aqueous sucrose solution is 119.55 mmhg. Using Raoult’s Law, calculate the mole fraction of water and the number of grams of sucrose in the solution if the mass of water is 150g. In this case, sucrose, which is a solute, is a non-volatile substance. Explain how this Raoult’s Law can be applied to solutions in which the solvent and solute are both volatile so that an appreciable amount of each can be in the vapor above the solution.