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4Feo + o2 -> 2fe2o3
fe2o3 +3 h2so4 -> fe2(so4)3 + 3h2o
feo + 2hcl -> fecl2 + h2o
1
2Fe+8HNO₃ -> 2Fe(NO₃)₃ +2 NO +4 H₂O
utelniacz hno3
reduktor fe