Question
An element with molar mass $2.7 \times 10^{-2} \mathrm{~kg} \mathrm{~mol}^{-1}$ forms a cubic unit cell with edge length 405 pm . If its density is $2.7 \times 103 \mathrm{~kg}^{-3}$, what is the nature of the cubic unit cell?
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Answer
$\text{Z}=\frac{\text{d}\times\text{a}^3\times\text{N}_\text{A}}{\text{M}}$
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