if the components of air are N2-78% ;O2-21%; Ar-0.9% and Co2-0.1% by volume (or mole) what would be the molecular weight of air?

Answer 1

just plug in the mol wts of the compounds in

0.78*N2 + 0.21*O2 + 0.009*Ar * 0.001*CO2

Answer 2

Good and a little bit difficult

Answer 3

Plug in the mol weights of the compounds in 9.78×14(N2)+0.21×16(O2)+0.009×40(Ar) +0.001×(12+16 ×2)(co2)