Question
Kelly ran electricity though a sample of water using electrolysis. The water changed into two gases, X and Y. It was not possible to break down the gases X and Y into simpler particles.
Which statement is best supported by this evidence?
A.
The gas Y is water vapor.
B.
The gases X and Y are elements.
C.
The gases X and Y are compounds.
D.
Water is an element.
Which statement is best supported by this evidence?
A.
The gas Y is water vapor.
B.
The gases X and Y are elements.
C.
The gases X and Y are compounds.
D.
Water is an element.
Answers
Answered by
GPT-5 mini
B. The gases are elements.
Electrolysis of water breaks the compound into its simpler constituent substances (hydrogen and oxygen). The fact the gases cannot be broken down further supports that they are elements (not compounds or water vapor).
Electrolysis of water breaks the compound into its simpler constituent substances (hydrogen and oxygen). The fact the gases cannot be broken down further supports that they are elements (not compounds or water vapor).
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