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percentage by mass!

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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.

最佳解答:

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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