Chemistry

Which is a chemical change?

A - splitting water into hydrogen and oxygen
B - breaking a block of solid ice into smaller pieces
C - freezing liquid water
D - boiling water
My answer: D

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  1. A necessary condition for a chemical change is that the material final material is different from the original material.

    For example, burning carbon in air gives carbon dioxide.
    Material before change: carbon
    product: carbon dioxide.
    Since carbon is chemically different from carbon dioxide, burning carbon in air is a chemical change.

    Based on the above, please give it another try.

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  2. Oh okay. Answer: A

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  3. It's correct! Would you care to explain your reasoning?

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