When an electric current passes through liquid water, hydrogen gas passes accumulates at one electrode and oxygen accumulates at the other. which of the following is true? a) a physical change has occurred, with energy is being absorbed. b) a chemical change has occurred, with energy being given off. c) a physical change has occurred, with energy being given off. d) a chemical change has occurred, with energy being absorbed.
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When an electric current passes through liquid water, hydrogen gas passes accumulates at one electro...
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