Regrettably, the chemical equation you’ve provided is invalid. In your equation, the total number of atoms for each element is not the same on both sides of the equation. Furthermore, the compounds Sn2 and O2 can’t appear without any reactants producing them.
Chemistry is a precise and rigorous science, so each chemical equation must follow the law of conservation of atoms. This means that the total number of atoms for each type must be the same on both sides of the equation.
Please review your equation and provide a valid chemical equation.