Chemistry 2 Barchart Answers at your fingertips to the essentials of a subject that is challenging at best and that many students struggle with. The 6 page laminated guide focuses on physical chemistry with the details and structure of the subject organized and designed to be a key to the answers that are further supported by your texts and lectures. Use as a review before testing, or as a memory companion that keeps your mind focused on the whole course daily, weekly, or as needed before exams.