11. Potassium chlorate decomposes to produce potassium chloride and oxygen gas.

## Step 1<br />The problem describes a chemical reaction where potassium chlorate (KClO3) decomposes to produce potassium chloride (KCl) and oxygen gas (O2). This is a type of chemical reaction known as thermal decomposition, which is a reaction where a single compound breaks down into two or more simpler substances.<br /><br />## Step 2<br />The balanced chemical equation for this reaction is:<br />### \(2KClO3 \rightarrow 2KCl + 3O2\)<br /><br />## Step 3<br />In this equation, the number of atoms of each element is the same on both sides of the equation, which is the definition of a balanced chemical equation.