(Originais Teachy 2024) - Question Medium of Chemistry

During a chemical synthesis experiment in a laboratory, an unknown organic substance was produced from the reaction between a sugar and an organic acid. To determine the percentage composition of this substance, a sample was burned in the presence of pure oxygen, observing the release of carbon dioxide and water as the only products of complete combustion. Subsequent analyses revealed that the substance was composed of 40% carbon, 6.7% hydrogen, and 53.3% oxygen by mass. Based on this information and considering the conservation of masses, determine the empirical formula of this organic substance.