Root mean square speed:

$\overline{){{\mathbf{v}}}_{{\mathbf{rms}}}{\mathbf{=}}\sqrt{\frac{\mathbf{3}\mathbf{R}\mathbf{T}}{\mathbf{m}}}}$ m is the molecular mass and R is the universal gas constant.

R = 8.13 J/mol•K

m = 2.02 × 10^{-3} kg/mol

What is the thermal speed of hydrogen (H_{2}) molecules at 800 K?

Please give your answer in km/s

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