Answer
cadmium sulfide: CdS
sulfuric acid: H2SO4
hydrogen sulfide: H2S
Work Step by Step
Cadmium forms 2+ ions, sulfide is a 2- ion, so they are in a 1:1 ratio.
The -ic ending in sulfuric acid indicates that it is the acid corresponding to the sulfate ion (SO4)2-, so the chemical formula is H2SO4
Hydrogen forms 1+ ions, and sulfide is a 2- ion, so they are in a 2:1 ratio.
