Answer:
An iron atom located on the heme portion of hemoglobin
Explanation:
Oxygen is attached to an <em>iron</em> atom located on the<em> heme</em> portion of hemoglobin.
Hemogoblin is a protein present in the red blood cells of several vertebrates. The main function of this protein is to transport oxygen through blood. The heme portion consists of an organic cyclic compound that contains 4 nitrogen atoms, which bond to an iron atom.
<span>Molality = moles of solute divided by kilograms of solvent
In this case let’s assume a 100g sample solution:
Since its 10.5% by mass, there is 10.5g glucose. The rest of the 89.5g is water.
Divide the 10.5g glucose by its molar mass (180g) to get the # of moles, which is 0.058moles
So now we have 0.058mole glucose divided by 0.089kilograms of water: the answer is 0.65molal</span>