помогите пожалуйста)))
составление уравнений реакций окисления:CaS+O2=;K2S+O2=; C2H6+O2=; C2H4+O2=; BaS+O2=; NH3+O2=; Mg2C+O2=; FeS+O2=; Cu2S+O2=; CuS+O2=; MgS+O2
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