Hemoglobin, a protein in red blood cells, carries o2 from the lungs to the body's cells. iron (as ferrous ion, fe2+) makes up 0.33 mass % of hemoglobin. if the molar mass of hemoglobin is 6.8 × 104 g/mol, how many fe2+ ions are in one molecule?

The number of ions in one molecule of hemoglobin are 4.

Explanation:

According to mole concept:

1 mole of an element contains number of atoms.

We are given:

Mass of 1 mole of hemoglobin =

number of molecules have a mass of

So, 1 molecule of hemoglobin will have a mass of

It is also given that 0.33 mass % of hemoglobin has ions

So, mass of ions will be =

Given mass of iron ion =

Molar mass of iron ion = 55.85 g/mol

Putting values in above equation, we get:

1 mole of an element contains number of atoms.

So, moles of hemoglobin will contain =

Hence, the number of ions in one molecule of hemoglobin are 4.

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