How Many Moles of Oxygen Atoms Are Present in 0

Multiple Choice

How many moles of oxygen atoms are present in 0.6163 grams of niacin , C₆H₅NO₂?

A) 5.14 × 10 ^{− 2} moles
B) 3.00 × 10 ^{− 2} moles
C) 1.00 × 10 ^{− 2} moles
D) 5.01 × 10 ^{− 3} moles
E) 8.56 × 10 ^{− 3} moles