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Calculate the number of degrees of freedom of molecules of hydrogen in 1 cc of hydrogen gas at NTP.

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Volume occupied by 1gram mole of gas at NTP = 22400cc

Number of molecules in 1cc of hydrogen

As each diatomic molecule has 5 degrees of freedom,

hydrogen being diatomic also has 5 degrees of freedom

Total no of degrees of freedom = 5 × 2.688 × 1019 

= 1.344 x 1020 

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