Question

The percentage of an iron in a haemoglobin molecule is 0.335%. If a haemoglobin molecule consist of four iron( II ) ions, what is the relative molecular mass of haemoglobin ? [ Relative atomic mass of Fe is 55.3 ]

Answer 1

1) the relative molecular mass of the whole iron in haemoglobin : 4*55,3=221,2
and it is 0.335% of the whole relative molecular mass of
haemoglobin.
Therefore, the relative molecular mass of haemoglobin :
221,4/0,335=660,3