Подберите коэффициенты методом электронного баланса
1)CuS+O2 - CuO+SO2
2)H2O+Na - NaOH+H2
3)N2+H - NH3
1)CuS+O2 - CuO+SO2
2)H2O+Na - NaOH+H2
3)N2+H - NH3
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1) 2CuS + 3O2 → 2CuO + 2SO2S(-2) -6e → S(+4) | x2
O2(0) +4e → 2O(-2) | x3
2) 2Na + 2H2O → 2NaOH + H2↑
Na(0) -1e → Na(+1) | x2
2H(+1) +2e → H2(0)
3) N2 + 3H2 → 2NH3
N2(0) +6e → 2N(-3)
H2(0) -2e → 2H(+1) | x3