The haemoglobin from red blood corpuscles of most mammals contains approximately 0.33% of iron by mass. The molecular mass of haemoglobin is 67200. The number of iron atoms in each molecular of heamoglobin is [Given: Atomic mass of Fe = 56 g/mol] Report your answer by rounding it upto nearest whole number.

Question

The haemoglobin from red blood corpuscles of most mammals contains approximately 0.33% of iron by mass. The molecular mass of haemoglobin is 67200. The number of iron atoms in each molecular of heamoglobin is [Given: Atomic mass of Fe = 56 g/mol] Report your answer by rounding it upto nearest whole number. (A)  (B)  (C)  (D)

Tardigrade Admin · Accepted Answer

100 g Haemoglobin =0.33 g Fe 67200 g Haemoglobin =(0.33 × 67200/100)=221.76 Number of iron atoms per molecules of haemoglobin =(221.76/56)=4

100 g Haemoglobin =0.33 g Fe 67200 g Haemoglobin =1000.33×67200​=221.76 Number of iron atoms per molecules of haemoglobin =56221.76​=4

100 g Haemoglobin $= 0.33$ g Fe

67200 g Haemoglobin $= \frac{0.33 \times 67200}{100} = 221.76$

Number of iron atoms per molecules of haemoglobin $= \frac{221.76}{56} = 4$