["AILY_ONE_PROBLEM_THEOREYICALICAL_BASE2DAY2DAILY_ONE_PROBLEMREDOX_BASES21118S11588558MnOClHClMnCl2ClHODOWMnCl2CO2ClH2OWDRECTIONALIGNEDM5NDCl223ADADADADADADADADADADADADADADADADADCOEFFICIENT_OFMDNClDISADADADADADADADADADADADADADADCOEFFICIENTOFMDNClISADADADADCOFFICIENTOFMDNClISADADADADADCOEFFICIENTOFMDClDISDADADADADADADADADADADADADADADADADADADADADADADADADADADADADADADADADADADADADADADADADREDUCTIONOXYATIONTIONREACTIONDGETSLODDSGETSLODDDGETDLODDDGETDLODDDGETDLODDDGETDLODDDGETDLODDDGETDLODDDGETDLODDDGETDLODDDGETDLODDDGETDLODDDGETDLODDDGETDLODDDGETDLODDDGETDLODDDGETDLODDDGETDLODDDGETDLODDDGETDLODDDGETDLODDDGETDLODDDGETDLODDDGETDLODDDGETDLODDDGETDLOLODDDGETDLODDDGETDLODDDGETFFICIENTOFMDClDISDAD
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选择题：MnO2+HCl=MnCl2+Cl2+H2O将反应配平后，MnCl2的系数为：（） A,1B,2C,3D,4 答案：A 提示：能阐述出解题过程的给予额外奖励，答案回复可见
A。氧化还原反应，得失电子数为2，反应式配平问题系数为1。