In 2012, administrative assistants averaged $33,560 a year, according to the Bureau of Labor Statistics. But this figure accounts for all administrative support, regardless of employer.Those working for dental offices averaged closer to $35,020.With training as a medical secretary, administrators working in dental offices can expect even higher salaries, at an average of $36,960.hose working for dental offices averaged closer to $35,020. With training as a medical secretary, administrators working in dental offices can expect even higher salaries, at an average of $36,960.
Human Sources of Sulfur Oxides; Wood Smoke; Contributors; It has been estimated that on a global basis, natural sources, such as volcanoes, contribute about as the same amount of sulfur oxides to the atmosphere as human industrial activities. This amounts to 75-100 million tons from each source per year. However, in industrial countries such as in Europe and North America, human activities contribute 95 % of the sulfur oxides and natural sources only 5 %. In the Western States, natural sources of sulfur oxides may be more important.
Sulfuric acid is produced from sulfur, oxygen and water via the contact process. In the first step, sulfur is burned to produce sulfur dioxide. (1) S(s) + O2(g) â SO2(g) This is then oxidised to sulfur trioxide using oxygen in the presence of a vanadium(V) oxide catalyst.