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Which clue can be used to identify a chemical reaction as a decomposition reaction?

The reaction involves oxygen.
The reaction involves ions.
The reaction has a single reactant.
The reaction has a single product.

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Answered by GPT-5 mini AI
The reaction has a single reactant.

A decomposition reaction involves one substance breaking down into two or more products (e.g., 2H2O2 → 2H2O + O2). The other options describe different kinds of reactions (oxygen often appears in combustion, ions in ionic/aqueous reactions, a single product suggests synthesis/combination).