The partial pressure of CH4(g) is 0.225atm
and C2H6(g) is 0.165 atm in a  mixture of
the two gases. What is the total pressure?
A gas mixture has three components, N2, O2
and He. If the total pressure of the mixture
is 0.78 atm and the partial pressure of N2
and He are 0.40 atm and 0. 18 atm
respectively, what is the partial pressure of
the O2 in the mixture?