Chemistry U2L4 Classification of acids and bases
20:00
Chemistry U2L3 Acids and bases
23:20
Chemistry U1L3 metal an non-metal
20:34
U2L1 Part 1 Solution
21:52
Chemistry U1L4 part one calculate oxidation number.
19:01
physics U3L2 Newton's Second law
28:20
U2L3 Equations of motion
15:50
Chemistry U1L2 ionization potential
25:31