What exactly does leaf hops absorb in the wort?

Are you talking dry or wet leaf hops. I dry mine. It’s hard to know what you will get from them. What I do is bitter with pellets so I can get the IBU I want. Then use the cones late and dry hop. I add a little more water and top off. You may want to use a little more grain or be prepared to add DME if your OG falls short