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Chemistry
What is the molar mass of hemoglobin, a protein responsible for transporting oxygen in mammals, given that it contains 0.347% iron by mass and each hemoglobin molecule has four iron atoms?
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To calculate the molar mass of hemoglobin, we need to determine the mass of iron in one hemoglobin molecule. Since each hemoglobin molecule contains four iron atoms, we can calculate the mass of iron by multiplying the mass of one iron atom by four. By using the molar mass of iron, we find that the mass of iron in one hemoglobin molecule is 3.709 x 10^-22 g.
Next, we can calculate the mass of one hemoglobin molecule by dividing the mass of iron by 0.00347, which represents the mass percentage of iron in hemoglobin. The mass of one hemoglobin molecule is found to be 1.069 x 10^-19 g.
Finally, to find the molar mass of hemoglobin, we multiply the mass of one hemoglobin molecule by Avogadro’s number. The molar mass of hemoglobin is approximately 64,300 g/mol.
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