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  4. 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.

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Q. 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.

NTA AbhyasNTA Abhyas 2020Some Basic Concepts of Chemistry

Solution:

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 $=\frac{221.76}{56}=4$