Question

An elemeny crystallises in bcc lattice with a cell edge of 3×10-8cm .The density of the element is 6.89gcm-3.Calculate the molar mass of the element .

Answer 1

Answer:

Formula units per unit cell for BCC (Z)=2

Edge of lattice (a)=3×10 ^-8cm

Density of element (d)=6.89g/cm

NA= 6.022×10^23

Molar mass of element (M)=?

As we know that,

M=d×Na×a^3/Z

M=6.89×10^23×6.022×(3×10^-8)^3 =56g

Hence the molar mass of element is 56g.

Explanation:

10 thanxxx = 10 thanxx + follow ..............

15 thanxx = 20 thanxx + follow ..