Question

air contains 78% N2, 21% O2, and 1% Ar, by volume. what is the density of air at 1,000. torr and -10C?

Answer 1

PV=nRT
PV=(m/MW)RT
P(V/m)=(R/MW)T
P(1/ρ)=(R/Mw)T
Mw = is the wean value of gas = air
Mw=0.78*Ar(N) + 0.28 Ar(O) + 0.01 Ar (Ar) Ar=atomic relative mass