Hey, I'm wondering how you figure out the number of hydrogen bonds acting between molecules. I know each water molecule supposedly makes 4 hydrogen bonds with other water molecules through my reading, but I want to know how many for isopropyl alcohol, which has only one OH group. I know its less than water based on the properties of the two, but thats it. I think it may be either 1 or 3 but im not sure how to figure this out. Any help would be appreciated.