28:09

Thermochemistry

51:01

lewis theory

1:00:08

Electrophilic substitution rxn

18:34

practical organic chemistry

22:13

شرح Steriochemistry part 1 - For pharmacy students ( Organic chemistry )

1:21:33

periodic table

46:54

solutions

11:42

شرح تفاعلات Merrifield synthesis