72. In the blood of an adult human, there are approximately 2.64 ✖1013 red blood cells with a total of 2.90 g of iron. On theaverage, how many iron atoms in each red blood cell? (Fe = 55.85 g/mol)
(A) 5.19 ✖ 10–2
(B) 4.72 ✖ 1011
(C) 1.09 ✖ 10–13
(D) 9.10 ✖ 1012
(E) 1.18 ✖ 109