Q 1115178069.     An element with molar mass `27 g mol^(−1)` forms a cubic unit cell with edge length `4.05 ✕ 10^(−8)` cm. If its density is `2.7 g cm^(−3)`, what is the nature of the cubic unit cell?

A

hcp

B

fcc

C

bcc

D

none of them

HINT

Use `d=(Z×M)/(a^3×N_A)`

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