If 10.4 grams of hydrogen, H2, and 9.14 grams of oxygen, O2, are placed together in a container and allowed to react according to the equation, how many grams of water, H2O, would be produced by the reaction? 2H2 + O2 2H2O Show all work

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