The residual entropy of the asymmetric molecule $\mathrm{N_2O}$ in its crystalline state is 5.8 $\mathrm{J\,K^{-1}\,mol^{-1}}$ at absolute zero. The number of orientations that can be adopted by $\mathrm{N_2O}$ in its crystalline state is
(a)4
(b)3
(c)2
(d)1
Answer
SELF-PRACTICE — the source book printed no answer.
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