The Atomic Mass of Mg Is 24

The atomic mass of Mg is 24.305 u. How many moles of Mg are there in a 3.50 g sample of magnesium?

A) 0.0182 moles
B) 0.144 moles
C) 0.218 moles
D) 0.226 moles
E) 1.31 × 10²³ moles