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An element exists in bcc lattice with a cell edge of 288 pm.

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An element exists in bcc lattice with a cell edge of 288 pm. Calculate its molar mass if its density is 7.2g/cm3.

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In bcc, z = 2;

d = (z x M)/a3 x NA             (i)

Putting values of M in equation (i)

M = 7.2g/cm3 x (288 x 10-10 cm)3 NA/2

= 51.8g/mol

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