Im a pre PT student completing a post bac and Im having a hard time with Chemistry, I barely got a B in gen chem I and Im starting the new semester off with a 60% on my first exam in gen chem II. I find the class ridiculously challenging to the point its almost overwhelming and most importantly I just dont like it. Will I ever need to calculate how much free space is in a simple cubic packed molecule besides in a chemistry class? My question is, are the PT pre-requisite courses a good indicator of the difficulty of the actual PT courses or are they more of a tool to narrow the applicant pool?