The AP Chem exam covers 9 units and 91 individual topics! This exam is not a walk in the park. See the webpage on suggested study plans for more information. Here is a table that lists the topics and their weights on the exam:
If you prefer a tutorial/video description of the AP Chemistry Course and its exam, you can view one here :https://apcentral.collegeboard.org/pdf/ap-chemistry-course-a-glance.pdf?course=ap-chemistry
Better start studying now!