how many moles of atoms are in 5.5g Fe

Hi GoldenLeaf,

I have no idea, but it looks impressive    (・_・ヾ

Find the molar mass of Iron

55.845 g/mol

Take the 5.5g (what you have) and put it in the numerator

Take the 55.845g/mol (molar mass) and put it in the denominator

$${\frac{{\mathtt{5.5}}}{{\mathtt{55.845}}}} = {\mathtt{0.098\: \!486\: \!883\: \!337\: \!81}}$$

There are 0.098 moles in 5.5g of Fe (iron)