Here's how to figure out the number of carbon dioxide molecules produced when methane burns:

1. The Balanced Chemical Equation

The balanced chemical equation for the combustion of methane is:

CH₄ + 2O₂ → CO₂ + 2H₂O

2. Mole Ratios

This equation shows that for every 1 molecule of methane (CH₄) burned, 1 molecule of carbon dioxide (CO₂) is produced.

Therefore, one molecule of methane burned produces one molecule of carbon dioxide.