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2C+ O2 —> 2CO
2HgO—> O2 + 2Hg
Na2O + CaCl2 —> CaO + 2NaCl
3Mg + SO3 —> 3MgO + S
Kartka 2:
2SO3 —> 2S + 3O2
2K + H2S —> K2S + H2
N2 + O2 —> 2NO
2Fe + 6HCL —> 2FeCl3 + 3H2