Question
Chemistry Question on Unit Cells
The density of a metal which crystallises in bcc lattice with unit cell edge length 300pm and molar mass 50gmol−1 will be
A
10gcm−3
B
14.2gcm−3
C
6.15gcm−3
D
9.32gcm−3
Answer
6.15gcm−3
Explanation
Solution
d=a3×NAZ×M For bcc structure, Z=2 d=6.023×1023×(300×10−10)32×50 =6.15gcm−3