Verified Solution • 2025–26 Session moderate

QNEET-2013-Ch-1457: NEET 2013 Chemistry - Class 12 NEET-2013-Ch-1457 Solution: A metal has a fcc lattice. The edge length of the unit cell is…

A metal has a fcc lattice. The edge length of the unit cell is 404 pm. The density of the metal is 2.72 g cm−32.72\ \text{g cm}^{-3}. The molar mass of the metal is (NAN_A Avogadro's constant = 6.02×1023 mol−16.02 \times 10^{23}\ \text{mol}^{-1}) 27 g mol−1mol^{-1} 20 g mol−1mol^{-1} 40 g mol−1mol^{-1} 30 g mol−1mol^{-1}

Multiple Choice Options

  • A 27 g mol −- _ 1
  • B 20 g mol −- _ 1
  • C 40 g mol −- _ 1
  • D 30 g mol −- _ 1

Step-by-Step Verified Solution

for fcc Z = 4. d = Z M N A a 3 _ M = d N A a 3 Z = 2.72 _ 6.023 _ 10 23 _ ( 404 _ 10 _ 10 ) 3 4 = 27 g mol �1

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