If you are looking for help in chemistry courses, especially in General Chemistry classes, you have several options:
Office Hours: If you miss class, it is your responsibility to learn the material. But, if you need clarification of material, write down your questions and visit your professor during her/his office hours.
Center for Academic Support and Advisement: offers FREE tutoring for various courses including General Chemistry. They have student led group tutoring/problem sessions as well as some individual tutoring. Visit the Student Success website for tutoring information. Don't wait until the end of the semester! Get help as soon as you need it.