Palladium-107 Undergoes β Decay (T_1/2 = 6

Palladium-107 undergoes β decay (t_1/2 = 6.5 × 10⁵ yr) to form silver-107. How long will it take for 0.150 mol of silver-107 to form from 1.25 mol of palladium-107?

A) 2.0 × 10 ⁷ y
B) 1.4 × 10 ⁷ y
C) 1.2 × 10 ⁶ y
D) 8.3 × 10 ⁵ y
E) 1.2 × 10 ⁵ y