JEE (Advanced) 2017 Paper-1

Question 26

A crystalline solid of a pure substance has a face-centred cubic structure with a cell edge of 400 pm. If the density of the substance in the crystal is 8 g $$cm^{-3}$$, then the number of atoms present in 256 g of the crystal is $$N \times 10^{24}$$. The value of N is


Correct Answer: 2


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