How Many Helium Atoms Are Present in 3

How many helium atoms are present in 3.0 × 10 ⁻² moles of the gas?

A) 5.6 × 10²¹
B) 1.8 × 10²²
C) 4.5 × 10²¹
D) 1.2 × 10 ^{− 26}