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.
Â© OCR 2014 Turn over 2 Coal fired power stations produce the pollutant gas sulfur dioxide, SO 2. This gas is toxic and produces âacid rainâ. (a) The sulfur dioxide reacts with water and oxygen in the atmosphere to produce sulfuric acid, H 2 SO 4.n some coals, the sulfur content can be up to 10% by mass. Calculate the mass of sulfur dioxide produced when 1.0 kg of coal is burnt. Assume the sulfur content to be 10% by mass. mass of SO 2 = ......................................................