4. [10 pts] 2.50g of a solid is completely dissolved in 25.0mL of water at an elevated temperature. The solubility of the solid in water at 0C is 0.480g/100 mL. When the solution is cooled to 0C, what mass of solid can be recovered? [10 pts] A 65% mixture of ethanol and water (mass \%; 65% ethanol, 35% water) has a density of 0.879g/mL. How many grams of ethanol are present in a 30.0 mL sample