Question

how many kilogram of S are contained in 1kg of iron pyrites FeS2​( atomic weight Fe =56 and S=32)

Answer 1

Answer:

Following is the list of oxidation numbers for all the species: Fe in FeS2= +2, i.e. ferrous state; S2 (2-) in FeS2 = -2, it is called persulfide ion, here each S has an oxidation number of -1; O in O2 has an oxidation number of 0, as every element in free state has oxidation number zero; Fe in Fe2O3 = +3, i.e. ferric ..

Explanation:

Or the Fe2+ and S2− ions form FeS, iron sulfide. All free elements have an oxidation state of 0. oxygen has an oxidation number −2 in most of its compounds except peroxides where it has an oxidation number −1.