chemistry

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a metal crystallizes in the face centred cubic cubic crustal structure with a unit cell edge of 5.48 x10 power of -8 cm.the density of the metal is 6.90g per cubic cm.
a. what is the mass in grams, of a single atom of this element.
b. what is the atomic weight of the element (g per mol).
c. what is the radius, in cm, of an atom of an element.

thank you..

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