<span>In their mechanism of action, a difference between lipid-soluble and water-soluble hormones is that </span>lipid-soluble hormones diffuse into the cell's plasma membrane to access protein receptors, while water-soluble hormones bind to protein receptors on the plasma membrane without diffusion.
Examples of lipid-soluble hormones are steroids. Examples of water-soluble hormones are polypeptides.
Given :
Number of molecules of 
.
To Find :
How many moles are in given number of molecules.
Solution :
We know, in 1 moles of any element/compound contains 
at atoms/molecules.
So, number of moles in 
molecules are :
Therefore, number of moles are 8.97 .
Explanation:
0.00191 moles AlCl3 X 3 chlorides/mole of AlCl3 = 0.00573 moles of chloride.
