A compound contains only carbon, hydrogen, nitrogen, and oxygen. Combustion of 0.157g of the compound produced 0.218g of CO2 and 0.0310g of H2O. In another experiment, 0.103g of the compound produced 0.0230g of NH3.
(a) What is the ?empirical formula of the compound
(b) If the molecular mass of this compound is about 198 u, what is its molecular formula?