fe+h2o=fe3o4+h2

fe+h2so4=feso4+h2

fe+hcl=fecl+h2

fe+cuso4=feso4+cu

fe+cu=fe+cu

написать уравнения реакций в ионной форме ОВР и расставить коэфиценты!!!\

ПОМОГИТЕ УМОЛЯЮ!!!!

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