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The body centred cubic cell of chromium has a length of 0.288 nm. Calculate the density of chromium (g/cm³) : (Atomic weight : Cr = 52.0)

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6.80

7.60

6.60

7.26

answer is D.

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Detailed Solution

d = ZM/ a³N ; z = 2, M = 52, a = 0.288×10^–7

d= $\frac{2 \times 52}{{(288 \times 10^{- 10})}^{3} \times 6.02 \times 10^{23}}$

d = 7.26 gm /cc

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