Question

Calculate the most probable speed of $O_2$ at STP

• A. 46.1 m/s
• B. 42.5 m/s
• C. 37.6 m/s
• D. 50.5 m/s

Answer 1

The correct option is C 37.6 m/s

$U_{MP}=\frac{U_{rms}}{1.224}$
Now, $U_{rms}=\sqrt{\frac{3RT}{M}}=\sqrt{\frac{3\times 8.314\times 273}{32\times {10}^{-3}}}$
$U_{rms}=46.1m/s$
$\therefore U_{MP}=\frac{46.1}{1.224}=37.6m/s$