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30 March, 17:21

When electricity is added to water, water breaks down and becomes hydrogen gas and oxygen gas. This is a chemical change because

A.

energy has been added.

B.

a liquid has become a gas.

C.

hydrogen and oxygen are chemicals.

D.

water has changed its identity

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Answers (1)
  1. 30 March, 17:43
    0
    A chemical reaction is when atoms/molecules are taken apart and rearranged to create something new. So I think the answer is B
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