Question

An element with density 2.8 g cm^-3 forms a fcc unit cell with edge length 4 x 10^-8 cm. Calculate the molar mass of the element. 

(Given : NA = 6.022 x 10²³ mol^-1)

Answer 1

d = 2.8 g cm^-3 , Z = 4 (for fcc), a = 4 x 10^-8 cm , NA = 6.022 x 10²³ mol^-1