If a current of 9.650 amperes (coulombs per seconds) is passed through a solution containing Ca2 ions for 5.000 minutes, how many moles of calcium can be deposited at the cathode

Some liquids can be distilled, but only at temperatures that are so high that it is impractical, or so high the compound decomposes. explain why distillation such compounds at significantly less than atmospheric pressure (some degree of vacuum) would solve this problem.