Допишите уравнения реакций и расставьте коэффициенты:
1. _P+_O2(избыток)→___(высший оксид,не димер)
2. _Al+____→_Al2O3
3._H2S+_O2→(to)_SO2+____
4._KNO3→(to)_KNO2+____
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