1. 1 chem exercise matter unit figure 40분

2. 2 chem exercise periodicity 42분

3. 3 chem exercise bonding 38분

4. 4 chem exercise covalent bond 31분

5. 5 chem exercise intermolecular force 44분

6. 6 chem exercise nomenclature 37분

7. 7 chem exercise mole 1 62분

8. 8 chem exercise mole 2 48분

9. 9 chem exercise enthalpy 1 42분

10. 10 chem exercise enthalpy 2 28분

11. 11 chem exercise energy 1 38분

12. 12 chem exercise energy 2 18분

13. 13 chem exercise kinetics 1 35분

14. 14 chem exercise kinetics 2 23분

15. 15 chem exercise equilibrium 1 29분

16. 16 chem exercise equilibrium 2 28분

17. 17 chem exercise acid base 1 30분

18. 18 chem exercise acid base 2 23분

19. 19 chem exercise acid base 3 38분

20. 20 chem exercise redox 34분