If the course doesn't show up as "online course" on your transcript and has a lab credit you are good to go.
But if it does show up as such, forget it.
I am personally doubtful that you would get much out of an online chemistry class it also may not be the best to set you up for success in Orgo or for the MCAT. Also, you need to be establishing some relationships with your science profs in order to get LORs later on in the application process. Some of my schools required 3 letters from science profs!!! Not sure why they wouldn't prefer letters from people who knew me better, as if medicine is only about science tests and labs. Anyways, if you want any good ones, you need to take the prof for more than one course, and definitly in person.