Question

1. Explain briefly how you can use MS alone to determine whether an unknown has a Cl or Br. Your answer should focus solely on the one most reliable detail (for example, what is the mass signal would you see—and possibly any other details about the signal). Answer separately for Cl and for Br.

a. Calculate the empirical formula, using only elemental analysis. Include all your work.

b.Calculate the mass of the empirical formula, using the standard “mass spectral” method.

c. Determine the molecular formula. Briefly explain how you arrived at your answer, specifically mentioning any relevant spectral data.

100 163 50 194 135 50 103 1 76 0 28 38 59 66 .179 92 179 20 30 40 5060 708090100 110120 130 140 150 60 0 180 190 200 C:61.85% H:5.19% 0:32.96% N: 0 % Х:

Answer 1

.:. Hese, n the glve spectoum , -there ae no cl 6 B au Intems or moles :- 5.149 mol 12. 01 .0019 = 2.060 5.991 2.499 : .V 5 5: 2 e 60.0555.0395 3.9938