Is it ok to put a baby painted turtle about the size of an apple in the same tank as a baby snapper that is only about the size of a quarter?

I would have to say no, but if you do you might want to check them to see if they don't fight, but I still wouldn't do it because then they will get use to each other when it is time to separate them and they will not eat. And the painted turtle might just go ahead and eat the snapper because it would be small enough to eat.