A 5.67 gram sample of an unknown compound was analyzed and found to contain 3.34 g of carbon, 1.77 g of oxygen and 0.56 g of hydrogen.

1) Find the empirical formula of the compound.

2) Find the molecular formula of the compound if its formula mass is 102 g/mol.

3) Using the information given in the spectra below derive the structural formula of the compound.