Надо , умоляю! Определите степени окисления каждого элемента в соединениях:
а) N2, N2O, NO2, N2O3, NH3
б) NaNO2, Ca(NO3)2, Cr(NO3)3, BaMnO4, Ba(MnO4)2
в) KCIO3, Na3PO4, CrPO4, Ca(CIO)2, Mg(CIO2)2
г) ZnSiO3, Ag2CO3, SrCrO4, Cu3(AsO4)2, NH4CI

а) N02N02, N+12O−2N+12O-2, N+4O−22N+4O-22, N+32O−23N+32O-23, N−3H+13N-3H+13 б) Na+1N+3O−22Na+1N+3O-22, Ca+2(N+5O−23)2Ca+2(N+5O-23)2, Cr+3(N+5O−23)3Cr+3(N+5O-23)3, Ba+2Mn+6O−24Ba+2Mn+6O-24, Ba+2(Mn+7O−24)2Ba+2(Mn+7O-24)2 в) K+1Cl+5O−23K+1Cl+5O-23, Na+13P+5O−24Na+13P+5O-24, Cr+3P+5O−24Cr+3P+5O-24, Ca+2(Cl+1O−2)2Ca+2(Cl+1O-2)2, Mg+2(Cl+3O−22)2Mg+2(Cl+3O-22)2 г) Zn+2Si+4O−23Zn+2Si+4O-23, Ag−12C+4O−23Ag-12C+4O-23, Sr+2Cr+6O−24Sr+2Cr+6O-24, Cu+23(As+5O−24)2Cu+23(As+5O-24)2, N−3H+14