Объяснение:
Cr ⁰ - 3ē = Cr3+
Cl2 +2ē = 2Cl-
2. H2⁰ -2ē =2H+
I2⁰ +2ē = 2I-
3.
3Mg + 8HNO3=3Mg(NO3)2 +2NO + 4H2O
Mg⁰ -2ē = Mg2+ 2 3
N +5 +3ē = N+2 3 2
Объяснение:
Cr ⁰ - 3ē = Cr3+
Cl2 +2ē = 2Cl-
2. H2⁰ -2ē =2H+
I2⁰ +2ē = 2I-
3.
3Mg + 8HNO3=3Mg(NO3)2 +2NO + 4H2O
Mg⁰ -2ē = Mg2+ 2 3
N +5 +3ē = N+2 3 2