An element with molar mass 2.7 × 10–2 kg mol–1 forms a cubic unit cell with edge length 405 pm. If its density is 2.7 × 103 kg m–3, the radius of the element is approximately ………. × 10–12 m (to the ne

Question

An element with molar mass 2.7 × 10–2 kg mol–1 forms a cubic unit cell with edge length 405 pm. If its density is 2.7 × 103 kg m–3, the radius of the element is approximately ………. × 10–12 m (to the nearest integer)

Prashant Kotian · Accepted Answer

Correct answer: .. d = Volume Na M Z   2.7 = 3 ] 05 . [ 02 . 27 Z      Z = 4  fcc unit cell For fcc unit cell 4r = a r = 405 .  = 143.1675 pm = 143.17 pm

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