CsBr crystallizes in a body centred cubic lattice of unit cell edge length \( 436.6 \mathrm{pm} ...

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CsBr crystallizes in a body centred cubic lattice of unit cell edge length \( 436.6 \mathrm{pm} \). Atomic masses of \( \mathrm{Cs} \) and \( \mathrm{Br} \) are 133 and 80 amu respectively. The density of \( \mathrm{CsBr} \) is:
(A) \( 8.50 \mathrm{~g} / \mathrm{cm}^{3} \)
(B) \( 4.25 \mathrm{~g} / \mathrm{cm}^{3} \)
(C) \( 42.5 \mathrm{~g} / \mathrm{cm}^{3} \)
(D) \( 0.425 \mathrm{~g} / \mathrm{cm}^{3} \)
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