a commercially available fertilizer has the following composition by mass :
46% of (NH4)2SO4 and 54% of (NH2)2CO
calculate the percentage of nitrogen in this fertilizer.
percentage by mass!
2007-03-12 7:48 am
回答 (1)
2007-03-12 8:07 am
✔ 最佳答案
RAM of N = 14.0, RAM of H = 1.0,
RAM of S = 32.1,
RAM of C = 12.0,
RAM of O = 16.0,
Formular mass of (NH4)2SO4 = (14 + 4*1) * 2 + 32.1 + 16*4 = 132.1
Formular mass of (NH2)2CO = (14 + 2*1) * 2 + 12 + 16 = 60
% of N in 46% of (NH4)2SO4 = 14*2 / 132.1 * 100% = 21.1961%
% of N in 54% of (NH2)2CO = 14*2 / 60 * 100% = 46.6667%
% of N in this fertilizer = 21.1961% * 46% + 46.6667% * 54% = 34.9502%
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http://hk.knowledge.yahoo.com/question/question?qid=7007031106375