# What is the rms speed of O_2 molecules at at 295 K?

Oct 13, 2016

$\textsf{479.4 \textcolor{w h i t e}{x} \text{m/s}}$

#### Explanation:

You can calculate the rms speed using:

$\textsf{{v}_{r m s} = \sqrt{\frac{3 R T}{{M}_{r}}}}$

Putting in the numbers:

$\textsf{{v}_{r m s} = \sqrt{\frac{3 \times 8.31 \times 295}{0.0320}} = 497.4 \textcolor{w h i t e}{x} \text{m/s}}$