Final answer:
The chemical equation Zn(NO3)2 + Mg represents a single-replacement reaction, more specifically, a metal replacement where magnesium displaces zinc from zinc nitrate.
Step-by-step explanation:
The chemical equation Zn(NO3)2 + Mg → Mg(NO3)2 + Zn represents a type of reaction known as a single-replacement or single-displacement reaction. In this type of reaction, an element replaces another element in a compound. Specifically, this is a metal replacement reaction, which is a subcategory of single-replacement reactions. One metal (Mg) displaces another metal (Zn) from its compound (Zn(NO3)2).
This type of reaction is demonstrated by the formation of Mg(NO3)2 and solid Zn. An example of another metal replacement reaction is the reaction between metallic zinc and a solution of copper nitrate, resulting in the formation of copper metal and zinc nitrate solution, as illustrated by Zn(s) + Cu(NO3)2(aq) → Cu(s) + Zn(NO3)2(aq).