Jak na moje oko (a nie jest ono zbyt obyte w angielskim jeszcze :D), to troszke daloby sie tam zmienic. Nie wiem czy Ci to pomoze, ale troche to przeksztalcilem i wyszlo cos takiego :D :
I am writing to apply for the position of …
I am … years old. I have graduated from Silesian Technical University. My degree is in Chemistry. During my studies I had to deal with using processors in chemistry, so I am able to make use of them at my work. The best proof for it is the fact that it was a topic of my M.A. thesis.
I have also many other virtues. I am a very sociable person and like working in a group. It is a result of the fact that used to work in a direct retail in my uncle\'s small business. Unexpected difficulties and stressful situations are not a great problem for me as I have had to manage a lot of them during my studies.
I am convinced that, my knowledge and strong motivation to work will be very useful for your company.
Mam nadzieje, ze okaze sie pomocne...