The Atomic Mass of Naturally Occurring Iron, Which Is a Mixture

Multiple Choice

The atomic mass of naturally occurring iron, which is a mixture of isotopes, is listed as . This means that the average mass of iron is

A) 55.847 times as great as that of a ¹²C atom.
B) 55.847 times as great as that of a ¹H atom.
C) 55.847/1.0079 times as great as that of a ¹H atom.
D) 55.847/12.000 times as great as that of a ¹²C atom.
E) 55.847/12.011 times as great as that of a ¹²C atom.