摘要:3.下列离子方程式正确的是 ( ) A.H2O2+2OH-2H2O+O2↑ B.3Cl2+6OH-ClO+5Cl-+3H2O C.2MnO+H2O2+6H+===2Mn2++3O2↑+4H2O D.2MnO+4H+===MnO+MnO2↓+2H2O 答案:B
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