Автор - Hadef

ОВР
2Al + 6HF = 2AlF3 + 3H2
3HNO2 + HNO3 = 2NO2 + H2O

Ответ

Автор - mskairatkizi
2Al0 -3e =2Al+3
2H-1 2e= H2(0)

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