. One mole of an ideal gas at standard temperature and pressure

occupies 22.4 L(molar volume). What is the ratio of molar volume to the atomic volume of a mole of hydrogen ? (Take the size of hydrogen molecule to be about 1). Why is this ratio so large ?


Best Answer


  • Size of hydrogen molecule =1Aº
  • Radius of hydrogen atom=0.5 Aº
  • Volume of hydrogen atoms assuming a perfect sphere is 

hydrogen molecule

  • Gasses have large interatomic separation so their is a lot of empty space

and hence we get such a large value of molar volume to the atomic volume.

Final Answer:-

The ratio is 7.08×104 due to the large interatomic separation  present between the gaseous atoms 


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