I just spoke to the admissions offices of NYU, BU, Mercy, and Minnesota. I didn't need to call Case since their requirement is only specific to Organic chemistry and I have other chemistry classes at a higher grade that would count for the other 6 required chem semester hours. I talked to these schools specifically because I am Canadian and these schools seem to be the most Canada friendly judging by the number of Canadians enrolled. Both BU and NYU told me that there is no minimum grade required for prerequisites and Minn and Mercy deemed it acceptable since I achieved a better grade in upper year chemistry classes. The lady at Minn was a bit more hesitant, but since I told her my other upper year chem grades and the fact that I'd be doing a Masters, she seemed satisfied. All in all, not too worried about it as Minn is probably a longshot for me at best anyways. So there you have it, hope this somewhat applies to you guys and helps ease some confusion, best of luck.