c1: cân bằng các PTHH sau:
1. P+O2------>P2O5 11. KMnO4----------->K2MnO4+MnO2+O2
2. Fe+O2--------->Fe3O4 12. KCLO3------------>KCL+O2
3. Na+O2--------->Na2O 13. KNO3------------>KNO2+O2
4. Al+O2----------->Al2O3 14. HgO------------->Hg+O2
5. S+O2------------>SO2 15. H2+O2--------->H2O
6. SO2+O2--------->SO2 16. H2+Fe2O3-------->Fe+H2O
7. C+O2------------>CO2 17. Na+H2O---------->NaOH+H2
8. CO+O2--------->CO2 18. Al+HCL------------>AlCl3+H2
9. CH4+O2--------->CO2+H2O 19. Na+H3PO4--------->NaPO4+H2
10. C4H10+O2----------->CO2+H2O 20. Na2O+H2O-------->NaOH
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Sinh Học lớp 12
