JEE Advanced 2017 Chemistry question
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, then the number of atoms present in 256 g of the crystal is . The value of is
Answer: 2
Solution
Cell volume cm; mass of one unit cell g. An fcc cell contains
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