Chemistry

Chemistry, 21.09.2019 15:00, minecraftpro64p7t123

Arelease of energy is a sign that
a physical change has just occurred
oxygen is present
a chemical change is taking place
organic chemicals are present

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Answers: 1

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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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Arelease of energy is a sign that
a physical change has just occurred
oxygen is present...

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