Terephthalic acid is an important chemical used in the manufacture of polyesters and plasticizers. It contains only C, H, and O. Combustion of 19.81 mg terephthalic acid produces 41.98 mg CO2 and 6.45 mg H2O. If 0.272 mol of terephthalic acid has a mass of 45.2 g, determine the molecular formula for terphthalic acid.