An organic compound contains C,H,N,and O. Combustion of 0.1023g of the compound in excess oxygen yielded 0.2766g of CO2 and 0.0991g of H2O. A sample...

An organic compound contains C,H,N,and O. Combustion of 0.1023g of the compound in excess oxygen yielded 0.2766g of CO2 and 0.0991g of H2O. A sample of 0.4831g of the compound was analyzed for nitrogen by the Dumas method. At STP, 27.6 mL of dry N2 was obtained. In a third experiment the density of the compound as a gas was found to be 4.02 g/mL at 127 degrees Celsius and 256 torr. what are the emperical formula and the molecular formula of the compound?