Question

An element has bcc unit cell, with edge length 10 amstrong,if density is 0.2g/cm^3,then molar mass of compound is

Answer 1

Answer:

Given:

Molecular mass, M = 75g

Edge Length, a= 5 A° = 5 × 10-10 m

Density, d = 2g/cc

To find: Radius of the metal atom, r

Solution:

Where z = number of atoms present per unit cell

Z = 2

Since the number of atoms is 2, the metal crystallizes in BCC structure.

r = 2.165 A° = 216.5 pm

Therefore the radius of the metal atom is 216.5 pm.