The characteristics odour of pineapple is due to ethylbutyrate, a compound containing carbon, hydrogen and oxygen. Combustion of 2.78mg of ethylbutyrate leads to formation of 6.32mg of CO2 and 2.58mg of H2O. (1) what is the empirical formula of the ethylbutyrate. (2) The mass spectrometric analysis of the compound suggests that the molecules mass should be between 100 and 120, what is the likely molecular formula of the compound?