MHT CET 2026 Chemistry question
Not in JEE Main or NEET syllabus
An element with a molar mass 27g mol forms a cubic unit cell. Calculate the number of atoms present in a unit cell if the density of metal is 2.7g cm
[ cm mol]
Answer: (C)
Solution
The density of a cubic unit cell is , where Z is the number of atoms per unit cell. Hence \frac{d a^3 N_A}{M}\frac{2.7\ g cm^{-3}× 40\ cm^3 mol^{-1}}${27\ \text{g
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