To determine the mass of iron in 6.02 x 10^23 atoms, we need to use the molar mass of iron, which is approximately 55.845 grams per mole.
Avogadro's number (6.02 x 10^23) represents the number of atoms in one mole of a substance. Therefore, if we have 6.02 x 10^23 atoms of iron, it is equivalent to 1 mole of iron.
Now we can calculate the mass of iron:
1 mole of iron = 55.845 grams
So, the mass of iron in 6.02 x 10^23 atoms of iron is also 55.845 grams.