A copper complex crystallizing in a CCP lattice with a cell edge of 0.4518 nm has been revelaed by employing X-ray diffraction studies. The density of a copper complex is found to be 7.26 g cm^-3. The molar mass of copper complex is___________ g mol^-1. (Nearest integer)

[Given : N_A = 6.022 * 10²³ mol^-1]

Density, $\rho =7.62gc{m}^{-3}$  

Cell edge, a = 0.4518nm = 0.458 * 10^-7 cm

Effective number of atoms, Z = 4 for CCP.

Using ; $\rho =\frac{Z*A}{N_A*a^3}$  

$\rho =\frac{4*A}{6.022*10^{23}*{\left(0.458*10^{-7}\right)}^3}$              

$7.62=\frac{4*A}{6.022*{\left(0.4518\right)}^3*10^2}$              

A = 105.79 g/mol

Ans. is 106 (the nearest integers)