Solution of task 226 of Chemistry Book Shimanovich 2003

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226. Compose electronic equations and indicate which process - oxidation or reduction - occurs in the following transformations:
Mn6 + -Mn2 +; Cl5 + -Cl-; N3 - N5 +
On the basis of the electronic equations, arrange the coefficients in the reaction equation, following the scheme:
Cu2O + HNO3 - Cu (NO3) 2 + NO + H2O

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