need help with benzoin calculations.

1. Report the yield and \% yield of benzil; be certain to show your calculations for both theoretical yield and % yield. 2. In the 1H NMR spectrum for benzoin, how many signals would you predict to see (assuming the aromatic hydrogens will display "accidental" equivalence)? 3. In the 1H NMR spectrum for benzil, how many signals would you predict to see (assuming the aromatic hydrogens will display "accidental" equivalence)? 4. In the 13C NMR spectrum for benzoin, how many signals would you expect to see? Which signal would be most de-shielded in this spectrum? 5. In the 13CNMR spectrum for benzil, how many signals would you expect to see? Which signal would be most de-shielded in this spectrum? 6. What would be the principle peaks observed in the IR spectrum for benzoin? 7. What would be the principle peaks observed in the IR spectrum for benzil? 8. Summarize and explain your observations from the "Test for the presence of unoxidized benzoin