A gas mixture contains $N X_{2}$ and $O X_{2}$ in the mole ratio $7 : 3$ at a total pressure of $800 mm Hg$ . The partial pressure of $O X_{2}$ in mm Hg (nearest integer) is

Numerical answer type, answer in mm Hg, tolerance 1.

Answer: 240 mm Hg

Mole fraction of

O X_{2}

= 3/10 = 0.30

. Dalton's law:

p_{O X_{2}} = 0.30 \times 800 = 240 mm Hg