Question

Which of these are equal to 6.02 x 1023 particles? 12.01 g carbon (C) 44.08 g of silicon dioxide (SiO2) 16 g of ozone (O3) 16.04 g of carbon tetrahydride (CH4)

Answer 1

It is known that 1 mol of a substance is equal to 6.02x10^3 particles. This is called the Avogadro's number. From this knowledge, we convert the mass of the substances given above into units of moles by using the molar mass.

12.01 g C ( 1 mol / 12.01 g) = 1 mol 
44.08 g SiO2 ( 1 mol / 60.08 g ) = 0.73 mol
16 g of O3 (1 mol / 48 g) = 0.33 mol
16.04 g CH4 (1 mol / 16.05 g ) = 0.99 mol

So, the answers are carbon and carbon tetrahydride.