A metal crystallizes in fcc structure with a unit cell side of 500 pm . If the density of the crystal is 1.33 g/cc, the molar mass of the metal is close to
(a)23
(b)24
(c)25
(d)26
Answer
Answer: C ✓ checked by 4AB · confidence high
Explanation
M = ρN_Aa³/Z = 1.33 × 6.022×10²³ × (5×10⁻⁸)³/4 = 100/4 = 25 g mol⁻¹.