Balance the following redox equations by the half-reaction method:
(a) H2O2 + Fe2+→Fe3+ + H2O (in acidic solution)
(b) Cu + HNO3→ Cu2+ + NO + H2O (in acidic solution)
(c) CN− + → CNO− + MnO2 (in basic solution)
(d) (in basic solution)
(e) (in acidic solution)
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