Answer:
Number of hydrogen
moleucles in 1 cc
\[\frac{\text{Avogadro
}\!\!'\!\!\text{ s}\,\,\text{number}}{\text{Volume}\,\,\text{occupied}\,\,\text{by}\,\text{1}\,\text{g}\,\,\text{mole}\,\,\text{of}\,\text{hydrogen}\,}\]
At
NTP.
\[=\frac{6.023\,\times
{{10}^{23}}}{22400}\,=2.7\,\times {{10}^{19}}\]
\[{{H}_{2}}\]
is diatomic
gas and each molecules has degrees of freedom.
Therefore,
number of degrees of freedom w molecules of hydrogen in 1cc of hydrogen gas
\[=5\times
2.7\times {{10}^{19}}\]
\[=13.5\times
{{10}^{19}}\]
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