8. A 0.4330 g sample of technical ammonium nitrate was heated with 20.00 ml of caustic soda solution (TNaOH = 0.03100 g/ml) until all ammonia was removed. 50.22 ml of 0.2090 M sulfuric acid (feq = 1/2) were used to neutralize the excess alkali. Determine the percentage of nitrogen in the sample.

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