A metallic element ' \( \mathrm{X} \) ' exists as a cubic lattice. Each edge of the unit cell is...

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A metallic element ' \( \mathrm{X} \) ' exists as a cubic lattice. Each edge of the unit cell is \( 2.90 \mathrm{~A}^{\circ} \) and density of metal is \( 7.20 \mathrm{~g} / \mathrm{cm}^{3} \). How many unit cells will be present in \( 100 \mathrm{~g} \) of the metal?
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