Is chemical a example of natural forces

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

What is the best describtion of the side of the moon that faces earth?

How many moles of na2s2o3 are needed to react with 0.12mol of cl2? show work.