The earth has layers because

Which of the following compounds does not contain molecules? question 2 options: co2 h2 nacl h2o

Word equation for k+ h2o yield koh + h2

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