ESE 2023Q19
Q: The density of α-Fe is 7.87 × 10³ kg/m³. Atomic weight of Fe is 55.8. If α-Fe crystallises in BCC space lattice, what is the lattice constant approximately? (Take Avogadro’s number (N) = 6.02 × 10²⁶/kg·mole and number of atoms per unit cell is 2)
(a)0·666 Å
(b)1·766 Å
(c)2·866 Å
(d)3·966 Å
Correct Answer: (b)
Detailed explanation coming soon.