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Given that the percentage of iron in hemoglobin is 0.334%, the molecular mass of hemoglobin is 67200, and the atomic mass of iron is 56, determine the number of iron atoms.

1. Multiply the molecular mass of hemoglobin by the percentage of iron
2. Divide 100 by the atomic mass of iron
3. Perform the calculation 67200 × 0.334 to find 4
4. Multiply 100 by 56

Correct answer: Perform the calculation 67200 × 0.334 to find 4

Solution

The number of iron atoms in haemoglobin can be calculated by determining the total mass of iron in one molecule of haemoglobin and dividing it by the atomic weight of iron. The calculation confirms there are 4 iron atoms.

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