Question

A balloon is inflated with 18.066×10^23 molecules of helium what will the mass in grams of helium gas?

Answer 1

Answer:

12.04gm

Explanation:

no.of molecules=mass/molecular mass*Na

18.066*10^23=m*6.02*10^23/4

18.066*10^23*4/6.02*10^23=m

18.066*4/6.02=m

m=12.04gm