Determine the molar specific heat of ammonia at a temperature of \(300 \mathrm{~K}\). Assume the ideal-gas formula and use the following data: the principal moments of inertia: \(I_{1}=4.44 \times 10^{-40} \mathrm{gcm}^{2}\), \(I_{2}=I_{3}=2.816 \times 10^{-40} \mathrm{gcm}^{2}\); wave numbers of the various modes of vibration: \(\bar{u}_{1}=\bar{u}_{2}=3336 \mathrm{~cm}^{-1}, \bar{v}_{3}=\bar{u}_{4}=950 \mathrm{~cm}^{-1}, \bar{v}_{5}=3414 \mathrm{~cm}^{-1}\), and \(\bar{v}_{6}=1627 \mathrm{~cm}^{-1}\).