Mn2O7 - Mn(VII), O(II);
SO3 - S(VI), O(II);
Al2O3 - Al(III), O(II);
ZnS - Zn(II), S(II);
CH4 - C(IV), H(I);
Al2S3 - Al(III), S(II).
Mn2O7 - Mn(VII), O(II);
SO3 - S(VI), O(II);
Al2O3 - Al(III), O(II);
ZnS - Zn(II), S(II);
CH4 - C(IV), H(I);
Al2S3 - Al(III), S(II).