uzupełnij współczynniki w reakcjach chemicznych Mg + O2 ->MgO Al +O2 ->Al2O3 H2 +Cl2 ->HCl Fe2O3 + H2 -> Fe+H2O NH3 + O2 -> N2 + H2O Pb3O4 + h2 -> Pb+H2O
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2Mg + 202 ---> 2MgO
4Al + 3O2 ---> 2Al2O3
H2 + Cl2 ---> 2HCl
Fe2O3 + 3H2 ---> 2Fe + 3H2O
4NH3 + 3O2 ---> N2 + 6H2O
Pb3O4 + 4H2 ---> 3Pb + 4H2O
Pozdrawiam, kate66 ;)