PLEASE HELP FAST!!! What is the molarity of a solution that contains 42.9 mol of calcium chloride (CaCl2) in a 45.0L solution?

Which best describes the present-day universe? opaque, expanding very slowly, stars produce heavy elements transparent, expanding at an accelerated rate, stars produce heavy elements opaque, expanding at an accelerated rate, stars produce only hydrogen and helium transparent, expanding very slowly, stars produce only hydrogen and helium