Question

types of reactions
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which is a characteristic of a decomposition reaction?
substance p replaces x in the compound xy.
substance xyz breaks down into x, y, and z.
substance z burns in the presence of oxygen to form zo.
substance x combines with y to form compound xy.

Explanation:

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

1. "Substance P replaces X in the compound XY" describes a single displacement reaction, not decomposition.
2. "Substance XYZ breaks down into X, Y, and Z" matches the definition of a decomposition reaction, as one compound splits into multiple simpler substances.
3. "Substance Z burns in the presence of oxygen to form ZO" describes a combustion reaction, not decomposition.
4. "Substance X combines with Y to form compound XY" describes a synthesis (combination) reaction, not decomposition.

Answer:

Substance XYZ breaks down into X, Y, and Z.