Moles of Fe in 3.13*1022 atoms of Fe

Answer: 0.05 moles

Explanation:

To convert from atoms to moles, you will need Avogadro's number.

Avogadro's number: 6.022*10²³atoms/moles

(3.13*10²²atoms) * (moles/6.022*10²³ atoms) = 0.05 moles

The atoms would cancel out and we will be left with our moles.