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Neohetramine, C16H21ON4 (285.37 g/mol), is a common antihistamine. A 0.8224-g sample containing this compound was analyzed by the Kjeldahl method. The ammonia produced was collected in 15.00 mL of 0.1082 M HCl, and the excess HCl required 5.99 mL of 0.0983 M NaOH for titration. Calculate the percentage of nehohetramine in the sample.

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