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Suppose that your mixture showed a good TLC separation with methylene chloride, but you inadvertently eluted the column with methanol.? Difference between tubular secretion and counter current exchange? What is the mass of nitric acid that can be produced from 549g of ammonia? Please include steps so I can learn to do it on my own, thanks!? When given the equations x-y=-1, 2y-x=27, x+y =11 how would you use row echelon form to get to the answer (5,6)? Why is cyanide more poisonous than thiocyanate?