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A chemical reaction is the only way to separate a(n)
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Answered by GPT-5 mini AI
A compound.

Compounds are substances whose elements are chemically bonded, so you must carry out a chemical change (for example, electrolysis of water to get H2 and O2) to separate them. Mixtures, by contrast, can be separated by physical methods (filtration, distillation, chromatography, etc.).