Объяснение:
8) K(I)O(II), S(IV)O(II), P(III)S(II), Cu(II)Br(I), N(III)H(I), Na(I)S(II), Cl(V)O(II)
9) SF4, Cr2O3, FeCl3, SiO2
SO3, Br2O7, BaS
