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The density of solid Cr is 7.15 g/cm3. What is the volume per atom of Cr?As a solid, Cr adopts a body-centered cubic unit cell. What is the volume of a unit cell of this metal?What is the edge length of a unit cell of Cr?

Answer :

1 cm^3) × (7.15 g/cm^3) / (51.99616 g Cr/mol) × (6.022 × 10^23 atoms/mol) = 8.28 × 10^22 atoms Cr in 1 cm^3

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