Estimate the average thermal energy of helium atom at a temperature of `27° C`. [Boltzmann constant is `1.38×10^(-23) J/K`].

Calculate the average translation kinetic energy of an ideal gas per molecule (epsilon) and per mole (E ) at 25^(@)C . (Boltzmann constant, k= 1.38 xx 10^(-23)JK^(-1) ).

If the value of Avogadro number is 6.023 xx 10^23 "mol"^(-1) and the value of Boltzmann constant is 1.380 xx 10^(-23) JK^(-1) , then the number of significant digits in the calculated value of the universal gas constant is [Hint: Since k and N, both have four significant figures, the value of R is also rounded off up to four significant figures.]