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The molecular weight of haemoglobin is a...

The molecular weight of haemoglobin is about 65.000 g/mol. Haemoglobin contains 0.35% Fe by mass. How many iron atoms are there in a haemoglobin molecule?

Text Solution

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100 g of haemoglobin contain 0.35 g of iron.
or, `100/65000` mole of haemoglobin contains `0.35/56` mole of Fe.
`therefore 1` mole of haemoglobin contains `0.35/56 xx 65000/100` moles of Fe.
=4.06 moles of Fe
Thus, one molecules of haemoglobin contains four iron atoms.
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