The molar mass of iron (Fe) is 55.845 g/mol. To calculate the number of moles of iron atoms in 56g of iron, we can use the formula:

Moles of iron atoms = Mass of iron (in grams) / Molar mass of iron

Substituting the given values into the formula, we get:

Moles of iron atoms = 56 g / 55.845 g/mol = 1 mole

Therefore, there is 1 mole of iron atoms in 56g of iron.