8 Cortisol 36274 gmol is a steroid hormone involved in prote

8. Cortisol (362.74 g/mol) is a steroid hormone involved in protein synthesis. Medically, it has a major use in reducing inflammation from rheumatoid arthritis. Cortisol is 69.6 % C. 8.46% H, and 22.1 % O. Calculate the following. ( 10 points) a. What is the empirical formula of Cortisol b. What is the empirical mass of Cortisol c. What is the molecular formula of Cortisol

Solution

Element              %              A.Wt             Relative number             simple ratio                 simplest ratio

C                        69.6           12                      69.6/12 = 5.8               5.8/1.38   = 4.2       4.2*5 =    21

H                         8.46            1                     8.46/1   = 8.46             8.46/1.38 =6            6*5=    30

O                       22.1            16                      22.1/16 = 1.38            1.38/1.38 = 1          1*5 = 5

        Empirical formula = C21H30O5

          The empirical formula mass = C21H30O5     = 362g/mole

         molecular formula = ( empirical formula)n

                      n = G.M.Wt/E.F.Wt

                          n = 362.74/362 = 1

     molecular formula = ( C21H30O5)1 = C21H30O5