An element crystallises in fcc type of unit cell. The volume of one unit cell is 24.99 × 1 0 − 24 cm 3 and density of the element 7 ⋅ 2 g cm − 3 . Calculate the number of unit cells in 36 g of pure sa

Question

An element crystallises in fcc type of unit cell. The volume of one unit cell is 24.99 × 1 0 − 24 cm 3 and density of the element 7 ⋅ 2 g cm − 3 . Calculate the number of unit cells in 36 g of pure sample of element?

TestHub · Accepted Answer

(C) Vol. of element = Density Mass ​ = 7.2 g cm − 3 36 g ​ = 5 cm 3 No. of unit cells in 36 g of pure sample of element = Vol. of one unit cell Total Vol. of element ​ = 24.99 × 1 0 − 24 cm 3 5 cm 3 ​ = 2.0 × 1 0 23

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