Calculate the molar mass of an element having density 7.8 ~g ~cm ⁻³ that forms bec unit cell. [ a ^3 N _ A =16.2 ~cm ^3 ~mol ⁻¹ ]

Step-by-step solution

For bec unit cell, n =2 . aligned & Density ( )= Mn a ^3 ~N _ A & 7.8= M 2 16.2 & M = 7.8 16.2 2 =63.18 ~g ~mol ⁻¹ aligned