Calculate the number of atoms per cubic meter in lead. the density and atomic weight of lead are 11.35 g/cm3 and 207.2 g/mol respectively. the value of avogadro's number is 6.022 x 1023 atoms/mol.

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