Question

A molecule having a molar mass of 145.7 g/mol crystallizes to a cubic solid where each edge of the unit cell is 665.0 pm. Each unit cell contains 2 molecules. What is the bulk density of the crystal?

Answer 1

$Density = \frac{2×145.7}{(665)^3×6.022×10^{23}×10^{-10}}=1.645×10^{-20}$