Is the decomposition of magnesite a redox reaction ? 

Explanation

To determine if the decomposition of magnesite (MgCO3) is a redox reaction, we need to analyze the reaction and the changes in oxidation states of the elements involved.

### Step-by-Step Solution:

1. **Write the Decomposition Reaction**:
The decomposition of magnesite can be represented by the following equation:
\[
\text{MgCO}_3 \rightarrow \text{MgO} + \text{CO}_2
...