The residual entropy of the asymmetric molecule $\mathrm{N}_{2} \mathrm{O}$ in its crystalline state is $5.8 \mathrm{JK}^{-1} \mathrm{mol}^{-1}$ at absolute zero. The number of orientations that can be adopted by $\mathrm{N}_{2} \mathrm{O}$ in its crystalline state is
(a)4
(b)3
(c)2
(d)1
Answer
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