AP Chemistry Unit 3 Practice Test 2026 Properties of Substances and Mixtures
AP Chemistry Unit 3 Practice Test 2026 Properties of Substances and Mixtures. These are sample questions and answers from Unit 3: Properties of Substances and Mixtures on the AP Chemistry exam. You can try both Multiple-Choice Questions and answers, as well as free-response questions. This unit is 18–22% of the Advanced Placement (AP) Exam score. …