Which substance is being oxidized and which is being reduced?
4Ag(s) + 2H2S(g) + O2(g) -->
2Ag2S(s) + 2H2O(g)

Oxygen is being oxidized while Ago is reduced

a plasma is a warm ionized gasoline consisting of approximately equal numbers of definitely charged ions and negatively charged electrons. the characteristics of plasmas are notably unique from the ones of ordinary neutral gases in order that plasmas are considered a awesome "fourth kingdom of remember."

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