The mass of 1.5 xx 10^(20) molecules of a substance is 20 mg . The molar mass of substance is

The mass of 1.5 xx 10^(20) molecules of a substance is 20 mg . The mol

1.	The mass of 1.5 xx 10^(20) molecules of a substance is 20 mg . The molar mass of substance is
Answer» `20` G 40 g 80 g 80 a.m.u Answer :C