3. Nitrogen from a sample of 0.8880 g of organic matter was transferred to (NH4) 2SO4 by the action of concentrated sulfuric acid, and ammonia was obtained by boiling with concentrated alkali. The liberated NH3 was absorbed by 0.1200 N. H2SO4 solution, of which 50.0 cm3 was taken. What percentage 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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