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The density of solid Ni is 8

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The density of solid Ni is 8.90 g/cm3. How many atoms are present per cubic centimeter of Ni?  

           atoms/cm^3

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

         unit cells/cm^3

What is the volume of a unit cell of this metal?

         cm^3

What is the edge length of a unit cell of Ni?

         cm