Question

Haemoglobin contain 0.33 % of iron by weight. The molecular mass of haemoglobin is approximately 67200. The number of iron atoms (At mass Fe = 56) present in one molecule of haemoglobins is :
A. 6
B. 1
C. 4
D. 2

Answer 1

Correct Answer - C
Mass of Fe in haemoglobin
`= (67200xx0.33)/(100)=222` (app)
Atomic mass of Fe = 56
No. of Fe atoms `= (222)/(56)=4` (app.)