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.

every chemical equation adheres to the law of conservation of mass, which states that matter cannot be created or destroyed. therefore, there must be the same number of atoms of each element on each side of a chemical equation.