Chemistry - Ideal Gas Question with Solution | TestHub

We know, $PV=\frac{W}{M_{}}.\frac{RT}{V}$.

Since the two gases have the same mass, the ratio of the partial pressure of O₂ to that of N₂ is given by:

$$\frac{P_{O_2}}{P_{N_2}}=\frac{M_{w(N_2)}}{M_{w(O_2)}}=\frac{28}{32}=\frac{7}{8}$$

Thus, $P_{O_2}=\frac{7}{8}{P}_{N_2}=0.875P_{N_2}$.