Question

a unit cell of sodium chloride has four formula units .the edge length of unit cell is 0.6 nm .what is the density of sodium chloride​

Answer 1

Explanation:

Z=4, M of NaCl = 58.443, N = 6.023×10^23, a =0.6 nm= 0.6×10^-10cm

d = (Z×M)/(N×a^3)

= (4 × 58.443) / {6.023×10^23 × (.6×10^-10)^3}

= 1.79 g/cm^3