1.Benzo[a]pyrene is a carcinogenic compound detected in grilled steaks. Combustion analysis of 3.22 mg of benzo[a]pyrene produced 11.25 mg of CO2 and 1.38 mg of H2O.

(a) Calculate the empirical formula of benzo[a]pyrene.

(b) In an experiment, 2.523 g of benzo[a]pyrene lowers the melting point of 50.0 grams of camphor to 170.6 ^oC. Calculate the molecular mass of the carcinogen.

2.Draw the Newman projection formulas for CH₃CHBrCH₂CH₃ and sketch the potential energy versus rotation diagram for a 360^o rotation of 2-bromobutane along C2 and C3 carbon atoms.