Question

question 8 of 10
what reaction shows a compound breaking apart into separate substances?

a. a decomposition reaction

b. a single - replacement reaction

c. a synthesis reaction

d. a double - replacement reaction

Explanation:

To solve this, we analyze each option:

• Option A: A decomposition reaction is defined as a reaction where a single compound breaks down into two or more simpler substances. This matches the description in the question.
• Option B: A single - replacement reaction involves one element replacing another in a compound, not a compound breaking into separate substances.
• Option C: A synthesis reaction is the combination of two or more substances to form a single compound, which is the opposite of what is described.
• Option D: A double - replacement reaction involves the exchange of ions between two compounds, not a compound breaking into separate substances.

Answer:

A. A decomposition reaction