Question #b0fca

2 Answers
Nov 19, 2017

Iron and sulphur

Explanation:

In various ratios (ie different formulae), depending on which sulphide we are talking about.

Nov 19, 2017

Well we could have "ferrous sulfide....", FeS, Fe(+II)

Explanation:

Or "ferric sulfide....", Fe_2S_3, i.e. Fe(+III)

"Iron pyrites", so-called "fools' gold" is FeS_2, contains the sulfur analogue of peroxide....O_2^(2-), and thus we have formally Fe(+II)....