What would be the mass of a 33.5dm3 sample of O2 at STP?

How many molecules are found in 1.32 mol of nacl?

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

Chemical engineering who specializes in negotiating for large purchases and instructing customers in use of the products are