Haemoglobin contains 0.25% iron by weight. The molecular weight of hae

1.	Haemoglobin contains 0.25% iron by weight. The molecular weight of haemoglobin is 89600. Calculate the number of iron atoms per molecule of haemoglobin.
Answer» 100 g haemoglobin has iron = 0.25 g 89600 g haemoglobin has iron = 0.25 x 89600/100 = 224 g Fe 1 mole or N molecules of haemoglobin has 224 g Fe = (224/56) g-atom of Fe = 4 g-atom of Fe = 4 N atom of Fe 1 molecule of haemoglobin = 4 atom of Fe

Haemoglobin contains 0.25% iron by weight. The molecular weight of haemoglobin is 89600. Calculate the number of iron atoms per molecule of haemoglobin.

Answer»

100 g haemoglobin has iron = 0.25 g

89600 g haemoglobin has iron = 0.25 x 89600/100 = 224 g Fe

1 mole or N molecules of haemoglobin has 224 g Fe

= (224/56) g-atom of Fe

= 4 g-atom of Fe

= 4 N atom of Fe

1 molecule of haemoglobin = 4 atom of Fe