How many oxygen atoms are present in a molecule of potassium permanganate?

Four

The correct answer is option 2. Four.

The chemical formula for potassium permanganate (\( \text{KMnO}_4 \)) provides information about the types and number of atoms in a single molecule of the compound.

In \( \text{KMnO}_4 \):

\( \text{K} \) represents potassium.

\( \text{Mn} \) represents manganese.

\( \text{O}_4 \) represents four oxygen atoms.

So, within one molecule of potassium permanganate, there are four oxygen atoms. The compound is a powerful oxidizing agent and is commonly used in various chemical reactions, including titrations and water treatment processes.