Answer
$2O_3\longrightarrow 3O_2$
Work Step by Step
$2O_3\longrightarrow 3O_2$ contains the same amount of oxygen in both the products and reactants.
You can help us out by revising, improving and updating this answer.
Update this answerAfter 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.