Chemistry, 14.12.2019 11:31 kellysurgit

All of space and the matter in it is ?

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Chemistry, 23.06.2019 02:00, raulflores01

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