3СuO+2NH3=3Cu+N2+3H2O
Cu(+2) +2e=Cu(0) -3-в-ние;ок-ль
2N(-3) - 6e= N2(0) -1-ок-ние;в-ль
3Cu(+2) +2N(-3) = 3Cu(0) +N2(0)
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