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Hemoglobin, an oxygen-carrying protein in blood, contains 4 iron atoms per molecule and the iron comprises 0.34% of the molecules mass. What is the molecular weight of hemoglobin?

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4*atomic mass Fe/molar mass hemoglobin = 0.0034
Solve for molar mass hemoglobin.

A.t.q
Mol3cular weight= 56×4/0.34×100

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