Question

Hemoglobin is a protein found in the blood of many animals which carries oxygen in the bloodstream. Oxygen gas binds to a part of the protein called the gene. Gene B is the missy common type of heme. Heme B contains 9.09% iron by mass. The atomic mass of iron is 55.85 amu. If there is exactly one iron atom in Heme B, what is the molar mass of Heme B?

Answer 1

In Heme B $9.09$ % of Iron is present by mass and it contain only one atom

We know that atomic mass of Iron atom is 55.85

So from this we can take mass of Heme B be x

9.09 % of X = 55.85

$\frac{9.09 \times x}{100}=55.85$

x= 614.41 g/mole is the molar mass of Heme B.