Calculate the molar mass of an element having density 21 g cm^ -3 that forms fcc unit cell [a^3.N_A = 36 cm^3mol^ -1 ]

MHT CET 2023 Chemistry question

Not in JEE Main or NEET syllabus

Calculate the molar mass of an element having density 21 g cm that forms fcc unit cell [a.N = 36 cmmol]

Answer: (B)

Density of a cubic crystal: , so . For an fcc unit cell Z = 4. Therefore \dfrac${21\ g cm^{-3}×36\

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Question ID VK-094590