Question

magnesium reacts with oxygen gas to produce magnesium oxide, light, and heat. this reaction is a) b) a decomposition reaction. b) d) a double replacement reaction. c) c) a single replacement reaction. d) a) a combination reaction.

Explanation:

A combination reaction occurs when two or more substances react to form a single product. Here, magnesium and oxygen (two substances) react to form magnesium oxide (a single product). Decomposition is the opposite (one - substance breaking into multiple), single - replacement involves one element replacing another in a compound, and double - replacement involves two compounds exchanging ions.

Answer:

D. A) a combination reaction.