The density of solid is — Solid State Chemistry Question

💡 Solution & Explanation

Molar mass $M = 55 + 3(19) = 112$. $Z = 1$. Density $d = \frac{1 \times 112}{6 \times 10^{23} \times (4 \times 10^{-8})^3} = \frac{112}{6 \times 10^{23} \times 64 \times 10^{-24}} = \frac{112}{38.4} \approx 2.92 \text{ g/cm}^3$. Therefore, correct answer is A.