Calcium crystallises in a face `-` centred cubic unit cell with `a=0.556nm`. Calculate the density if it contained `0.1%` Vacancy defects.

Explanation

Thus, density can be determined using `d = (zM)/(a^(3)N_(0))`
d (with vaccance defect) `= (3.996 xx 40)/((0.556 xx 10^(-7))^(3) xx 6.02 xx 10^(23)) = 1.5448 g//m^(3)`