Question

what type of reaction is shown below? check all that apply.
2mg+o₂→2mgo
□ synthesis
□ decomposition
□ combustion

Explanation:

1. Synthesis Reaction: A synthesis reaction is when two or more substances combine to form a single product. In the reaction \(2\text{Mg} + \text{O}_2

ightarrow 2\text{MgO}\), magnesium (\(\text{Mg}\)) and oxygen (\(\text{O}_2\)) combine to form magnesium oxide (\(\text{MgO}\)), so it fits the synthesis definition.

1. Decomposition Reaction: A decomposition reaction is the opposite of synthesis, where a single compound breaks down into two or more simpler substances. Here, we are combining substances, not breaking them down, so decomposition is not applicable.
2. Combustion Reaction: Combustion typically involves a substance reacting with oxygen to produce energy (heat/light) and usually oxides. Magnesium reacting with oxygen to form magnesium oxide is a combustion reaction as it involves burning (reaction with \(\text{O}_2\)) and produces an oxide.

Answer:

A. synthesis, C. combustion