The density of solid is — Solid State Chemistry Question

💡 Solution & Explanation

Molar mass of MnF3 = 55 + 3 * 19 = 112 g/mol. Volume of unit cell V = a^3 = (4.00 * 10^-8 cm)^3 = 64 * 10^-24 cm3 = 6.4 * 10^-23 cm3. Density ρ = (Z * M) / (Na * V) = (1 * 112) / (6 * 10^23 * 6.4 * 10^-23) = 112 / 38.4 = 2.92 g/cm3.