The answer is below.
Work Step by Step
When a candle burns, a gas is produced through a chemical reaction. Thus, the mass is not "disappearing" when the candle burns, but it seems to be since we often do not notice the gas that is put off.
You can help us out by revising, improving and updating this answer.Update this answer
After you claim an answer you’ll have 24 hours to send in a draft. An editor will review the submission and either publish your submission or provide feedback.