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a 0.492 g sample of hemoglobin is found to contain 0.34% of fe. if it is assumed that each hemoglobin molecule has four fe+ ions ,calculate the molecular weight of hemoglobin.

a 0.492 g sample of hemoglobin is found to contain 0.34% of fe. if it is assumed that each hemoglobin molecule has four fe+ ions ,calculate the molecular weight of hemoglobin.

Grade:11

1 Answers

Arun
25750 Points
5 years ago
Iron in the sample: 

0.492 g times 0.00345 = 0.0016974 g 

One mole of iron atoms weighs 55.845 g. Four moles weighs 223.38 g 

0.0016974 g is to 0.492 g as 223.38 g is to x 

x = 64747.826 g/mol 

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