Calculate the Number of Americium-241 Atoms Present in a Smoke $\mu$

Calculate the number of americium-241 atoms present in a smoke alarm containing 0.30 $\mu$ g of radioactive ²⁴¹Am (241.06 g/mol) .

A) 7.5 $\times$ 10¹⁴ atoms
B) 1.8 $\times$ 10¹⁷ atoms
C) 2.5 $\times$ 10²¹ atoms
D) 6.0 $\times$ 10²³ atoms
E) 1.4 $\times$ 10⁵ atoms