What is the molar mass of hemoglobin?

Question

Hemoglobin, the oxygen-carrying protein in red blood cells, has four iron atoms per molecule and contains 0.340% percent iron by mass. Calculate the molar mass of hemoglobin.

Answer 1

(4xFe atomic mass) / molar mass of hemoglobin = 0.340%

223.4 / molar mass of hemoglobin = 0.0034

molar mass of hemoglobin = 65706 (65,700)