Edge length of unit cell is \( 3.608 \times 10^{-8} \mathrm{~cm} \)...

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Edge length of unit cell is \( 3.608 \times 10^{-8} \mathrm{~cm} \), which crystallizes in fcc and is determined to have a density of \( 8.92 \mathrm{~g} / \mathrm{cm}^{3} \). The mass of four atoms is
(a) \( 4.18 \times 10^{-22} \)
(b) \( 1.67 \times 10^{-21} \)
(c) \( 2.09 \times 10^{-22} \)
(d) \( 8.37 \times 10^{-22} \)
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