# Question #c3fe6

Apr 12, 2017

use the formula $\sqrt{\frac{3 R T}{M}}$

#### Explanation:

root mean square speed of any molecule/atom can be found by using formula : $\sqrt{\frac{3 R T}{M}}$ where R is the universal gas constant , T is the temperature in kelvin and M is mass of the molecule/atom in kg.
thus , rms speed of hydrogen atom is = $\sqrt{\frac{3 \cdot 8.314 \cdot 900}{1 \cdot {10}^{-} 3}}$
= $4737.91 m {s}^{-} 1$