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13 July, 20:34

The density of solid Cr is 7.15 g/cm3. How many atoms are present per cubic centimeter of Cr?

As a solid, Cr adopts a body-centered cubic unit cell. How many unit cells are present per cubic centimeter of Cr?

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  1. 14 July, 00:26
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    For a body centered cubic unit cell, it is known that there will be two atoms per unit cell. For the number of unit cells per cubic centimeter, we do as follows:

    (7.15g / 1 cm³) x (1 mol / 52.00g) x (6.022x10^23 atoms / 1 mole) x (1 unit cell / 2 atoms) = 4.14 x 10^22 units cells / cm^3

    Hope this answers the question. Have a nice day.
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