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最佳答案:H2S+NaOH==NaHS+H2ONaHS+NaOH==Na2S+H2O
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最佳答案:NaOH+H2S=NaHS+H2O和2NaOH+H2S=Na2S+2H2O
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最佳答案:2H2S+3O2=2SO2+2H2O