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

2. Substance XYZ breaks down into X, Y, and Z.
An example of this type of reaction is decomposition of CaCO₃.
CaCO₃ ⇒ CaO + CO₂

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

Read the sentences below in 1962, i tried to enroll as the first black student at the university of mississippi. the governor of mississippi blocked my entrance which best describes the verbs used in the sentences? o they are past tense verbs, which are often used in narrative essays o they are past tense verbs, which are not often used in narrative essays. o they are future tense verbs, which are often used in narrative essays o they are future tense verbs, which are not often used in narrative essays.