The molecular weight of haemoglobin is about 65.000 g/mol. Haemoglobin contains 0.35% Fe by mass. How many iron atoms are there in a haemoglobin molecule?

The molecular weight of haemoglobin is about 65.000 g/mol. Haemoglobin

1.	The molecular weight of haemoglobin is about 65.000 g/mol. Haemoglobin contains 0.35% Fe by mass. How many iron atoms are there in a haemoglobin molecule?
Answer» Solution :100 g of haemoglobin contain 0.35 g of IRON. or, `100/65000` mole of haemoglobin CONTAINS `0.35/56` mole of Fe. `THEREFORE 1` mole of haemoglobin contains `0.35/56 xx 65000/100` MOLES of Fe. =4.06 moles of Fe Thus, one molecules of haemoglobin contains four iron atoms.