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The chemical formula of silver sulfide is Ag2S.
Formula: S2-
Formula: CaS
Formula: SiS2
S2-
Cs2S
S-1
NiS
FeS
The chemical formula for lead (IV) sulfide is written as PbS2.
Cu2S
The chemical formula for tin sulphide is SnS
Cu2S is copper(I) sulfide