A 0.50 L solution of sodium sulfate, Na2SO4, contains 0.85 mole of the solute. what is the approximate molarity of the solution? a) 2.00 M
b) 0.45 M
c) 1.7 M
d) 0.59 M

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.