Retrieving "Hydrogen Molecule" from the archives

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1. Root Mean Square Speed

   Linked via "hydrogen molecule"

   Characteristic $v_{rms}$ Values
   The following table provides illustrative values for the root-mean-square speeds of common gases at standard temperature and pressure (STP: $T = 273.15 \text{ K}$, $P = 101.325 \text{ kPa}$). Note the dramatic difference between the light hydrogen molecule and the heavy xenon atom.
   | Gas | Molar Mass $M$ ($\text{g}/\text{mol}$) | $v_{rms}$ at STP ($\text{m}/\text{s}$) | Reference Speed…