_H2C2O4+_MnO4" +_H离子---_Mn2++_CO2+_H2O配平
怎么根据化合价升降法配平_H+ +_Cr2O72-+_Fe3O4--_Fe3++ Cr3++_H2O
配平反应方程式 _Fe3+_SO2+_H2O=_Fe2+_SO42-+_H+
配平:_KMnO4+_Na2SO3+_H2SO4=_MnSO4+_K2SO4+_Na2SO4+_H2O
配平下列化学方程式 (1)_Fe+_HNO3--_Fe(NO3)3+_N2+_H2O (2)_Cl2+_I2+_H2O-
sc_ _t_r v_s_t br_ _h r_st_ _t_nt h_mew_ _k
1)_Na2Sx+_NaClO+_NaOH=_Na2SO4+_NaCl+_H2O
配平下列反应的化学方程式 _AL+_H2SO4---_AL2(SO4)3+_H2↑;_C+_CuO---_CO+_CO2
填单词补全句子1.One speaks with his m_ _ _h.
英语句子解疑There is a great true story about the Chinese chess,_h
He was killed.He killed himself.(改为选择疑问句) Was he killed _ _h
英语翻译class FloatMap2Aligned{int _w = -1,_h = -1,_stride = 0,_
(1)_Na2Sx+_NaClO+_NaOH=_Na2SO4+_NaCl+_H2O (2)_Cu2S+HNO3=_H2S