The average (mean) speed of $O X_{2}$ molecules (molar mass $32 g mo l^{- 1}$ ) at $350 K$ , taking $R = 8.314 J K^{- 1} mo l^{- 1}$ and $π = 3.1416$ , in $m s^{- 1}$ (nearest integer) is

Numerical answer type, answer in m/s, tolerance 2.

Answer: 481 m/s

u_{av} = \frac{8 RT}{π M} = \frac{8 \times 8.314 \times 350}{3.1416 \times 0.032} = 231562 = 481.2 \approx 481 m s^{- 1}