Question #227977

which of the following pairs of chemicals does the named element show the same oxidation number

Iron in FeO and Fe2O3
copper in Cu2O and CuO
sulphur in SO3 and H2SO4
manganese in MnO2 and KMnO4

Expert's answer

sulphur in SO3 and H2SO4


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Guyana #340795 on Jan 2024