40БАЛЛОВ: уравнять методом электронного баланса
1)H2S+O2 -> SO2 + H2O
2) H2S+O2 -> S + H2O
1)H2S+O2 -> SO2 + H2O
2) H2S+O2 -> S + H2O
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1) 2H2S+3O2--->2SO2+2H2OS⁻² - 6e --->S⁺⁴ I2
2O° +2*2e---->2O⁻² I3
2) 2H2S+O2--->2S+2H2O
S⁻² -2e--->S° I2
2O° +2*2e--->2O⁻² I1