Question

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.

Explanation:

A decomposition reaction is defined as a chemical reaction where a single compound (reactant) breaks down into two or more simpler substances. Let's analyze each option:

• "The reaction involves oxygen" describes combustion or oxidation, not decomposition.
• "The reaction involves ions" refers to ionic reactions, not specific to decomposition.
• "The reaction has a single reactant" matches the definition of decomposition (one reactant breaking down).
• "The reaction has a single product" describes a synthesis reaction (multiple reactants forming one product).

Answer:

The reaction has a single reactant.