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A metallic element has a cubic lattice. Each edge of the unit cell is $2A^{\large\circ}$. The density of the metal is 2.5 $g cm^{–3}$. The unit cells in 200 g of metal are

1 Answer

$1 \times 10^{25}$
Hence (D) is the correct answer.
answered Jun 5, 2014 by sreemathi.v