@nasa2014 “they say it would a big jump from a Communtiy college chemistry to college chemistry.”
I think that community college chemistry is not very different from college chemistry. The issue is that you are not apply to a random college; you are applying to Cornell. Many posters will attempt to tell you that Ivies use the same books and cover the same material, and that is a true statement. However, in many cases they will cover more material faster and in more detail than an average school. Also, the labs, assignments and projects may be much more extensive.
I don’t think you understand that they are doing this for your benefit. They do not want you to be blindsided because you do not have the same base to work from as the other students. However, while they are not granting you credit initially, if you are completely ready for the higher level material, you can discuss it with your faculty advisor or test out of the lower level. That does happen. You can work through that with your faculty advisor.
For example, D had already taken MV calc, as a review. After a week of classes she told her FA that she was bored stiff and already knew the things they were teaching. The FA spent an hour quizzing her about MV calc. He became comfortable that she did understand the material, and then moved her up to the next higher Calculus course. When she completed the next higher course with a satisfactory grade, she also received retroactive credit for MV calc.