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A 0.534 g of sample of haemoglobin on analysis was found to contain 0.34% Fe. If each haemoglobin molecule has four Fe2+ ions, what is the molecular mass of haemoglobin? (Fe = 56 amu)

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64.882.1g

55882.0g

65200.3g

65882.4g

answer is D.

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Detailed Solution

100 g of haemoglobin contains

=0.34 g

of Fe

1 Mole of haemoglobin contains

4 Fe+2

ion =4×56 g=224 g

0.34 g

of Fe is present in 100 g of haemoglobin

224 g of Fe is present in

=100×2240.34= 65882.4 g

MW of haemoglobin

= 65882.4 g

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