A solid mixture consists of 51.0 g ofKNO3 (potassium nitrate) and 9.0 gofK2SO4 (potassium sulfate). The mixture is added to 130g of water. If the solution described in the introduction is cooled to 0 degrees celsius, what mass of KNO3 should be cystallize? Enter your answer numerically in grams and please show all work step by step.