124. Задачка по химии №012 467

3. Nitrogen from a sample of 0.8880 g of organic matter was transferred to (NH4) 2SO4 by the action of concentrated sulfuric acid, by boiling which ammonia was obtained with concentrated alkali. The liberated NH3 was absorbed by 0.1200 N. H2SO4 solution, of which 50.0 cm3 was taken. How many percent of nitrogen does organic matter contain if 12.0 cm3 0.09800 N is spent on titration of excess sulfuric acid? NaOH solution?

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