Раставьте коэфициенты методом баланса
1.H2SO4+H2S--->S+SO2+H2O
2.H2SO4+HBr--->Br2+SO2+H2O
3.KOH+S--->K2S+K2SO4+H2O
4.HNO3+HI--->HIO3+NO2+H2O
5.HNO3+I--->H3PO4+NO2+H2O
Срочно отдам все баллы!!!!!
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