Neohetramine, C16H21ON4 (285.37 g/mol), is a common antihistamine. A 0.1247-g sample containing this compound was analyzed by

Question:

Neohetramine, C16H21ON4 (285.37 g/mol), is a common antihistamine. A 0.1247-g sample containing this compound was analyzed by the Kjeldahl method. The ammonia produced was collected in H3BO3-; the resulting H2BO3- was titrated with 26.13 mL of 0.01477 M HCl. Calculate the percentage of neohetramine in the sample.