How many moles of iron atoms are in 5.2 mol of fe2o3?

1 moles

You can view more details on each measurement unit: molecular weight of Fe2O3 or grams This compound is also known as Ferric Oxide or Hematite or Iron(III) Oxide. The SI base unit for amount of substance is the mole. 1 mole is equal to 1 moles Fe2O3, or 159.6882 grams.

the atomic number will stay the same no matter how many electrons it has, so it doesn’t decrease nor increase. it’ll only change with a different number of protons