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OpenStudy (anonymous):
when an electric current is passed through water during the process of electrolysis, 2 gases are formed one gas has a boiling point of -183 c and the other has a boiling point of -253c. has a physical change or chemical change occured. explain Please help me I don't understand
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OpenStudy (anonymous):
H2O becomes hydrogen, H2 and oxygen, O2, and a chemical change has occurred. A physical change would be, for example, freezing or evaporating but staying H2O.
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