October 2021 1 18 Report
Реакции протекают по схемам
PbS + HNO3 --> S + Pb(NO3)2 + NO + H2O
Расставьте коэффициенты в уравнениях реакций. Укажите для каждой реакции окислитель и восстановитель; какое вещество окисляется, какое восстанавливается.​
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