The edge length of \( \mathrm{NaCl} \) unit cell is \( 564 \mathrm{pm} \). What is \( \mathrm{P}...

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The edge length of \( \mathrm{NaCl} \) unit cell is \( 564 \mathrm{pm} \). What is
\( \mathrm{P} \)
the density of \( \mathrm{NaCl} \) in \( \mathrm{g} \mathrm{cm}^{-3} \) ? \( \left(\mathrm{N}_{\mathrm{A}}=6.02 \times 10^{23}, \mathrm{Na}\right. \)
W
\( =23.0 \) and \( \mathrm{Cl}=35.5 \) )
(A) \( 4.32 \mathrm{~g} \mathrm{~cm}^{-3} \)
(B) \( 6.48 \mathrm{~g} \mathrm{~cm}^{-3} \)
(C) \( 2.16 \mathrm{~g} \mathrm{~cm}^{-3} \)
(D) \( 3.16 \mathrm{~g} \mathrm{~cm}^{-3} \)
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