hemoglobin is the oxygen-carrying molecule of red blood cells,consisting of a protein and a nonprotein substance is called heme.a sample of heme weighing 35.2 mg contains 3.19 mg of iron.if heme molecule contains one atom of iron,what is the molecular weight of hem/
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To find the molecular weight of hemoglobin (Hb), we need to calculate the sum of the weights of all the atoms in the molecule.
First, let's calculate the molecular weight of the heme part of hemoglobin, since it contains the iron atom.
Given:
Weight of heme (molecule) = 35.2 mg
Weight of iron in heme = 3.19 mg
Since the heme molecule contains one atom of iron, we can assume that the weight of iron accounts for all the weight of the iron atom in the heme molecule.
Therefore, the molecular weight of heme = Weight of heme = 3.19 mg
Now, we need to calculate the molecular weight of the protein part of hemoglobin.
Given that iron is the only atom in the heme molecule, the rest of the molecular weight of the heme is attributed to the protein part of hemoglobin.
Molecular weight of protein part = Molecular weight of heme - Molecular weight of iron
= 35.2 mg - 3.19 mg
= 32.01 mg
Finally, we can calculate the molecular weight of hemoglobin by adding the molecular weight of the protein part and the molecular weight of the heme part.
Molecular weight of hemoglobin = Molecular weight of protein part + Molecular weight of heme
= 32.01 mg + 3.19 mg
= 35.20 mg
Therefore, the molecular weight of hemoglobin is 35.20 mg.