13:28

AP Chem 5.6

26:42

AP Chem 6.7

34:17

AP Chemistry 5.4

23:40

AP Chem 5.10 & 5.11

32:07

AP Chemistry 5.9

37:08

AP Chemistry 4.9

26:19

AP Chem 6.9

1:01:26

Chemical Composition and Reactions- Chapter 8