Lysine, an essential amino acid in the human body, contains C, H, O, and N. In one

Question:

Lysine, an essential amino acid in the human body, contains C, H, O, and N. In one experiment, the complete combustion of 2.175 g of lysine gave 3.94 g CO2 and 1.89 g H2O. In a separate experiment, 1.873 g of lysine gave 0.436 g NH3.
(a) Calculate the empirical formula of lysine.
(b) The approximate molar mass of lysine is 150 g. What is the molecular formula of the compound?