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A metal of density kg has a fcc crystal structure with lattice parameter, a = 400 pm. Calculate the number of unit cells present in 0.015 kg of the metal.
(a)
(b)
(c)
(d)

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Important Questions on Solid State
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(Avogadro constant )

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The edge length of a solid possessing cubic unit cell is (structure I), based on hard sphere model, which upon subjecting to a phase transition, a new cubic structure (structure II) having an edge length of is obtained, where is the radius of the hard sphere. Which of the following statements is true ?

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(Given atomic weight of

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