<Tr> <Td> Acidity (pK) </Td> <Td> 4.6 </Td> </Tr> <Tr> <Th_colspan="2"> Structure </Th> </Tr> <Tr> <Td> Molecular shape </Td> <Td> approximately linear </Td> </Tr> <Tr> <Th_colspan="2"> Hazards </Th> </Tr>

Determine the percent by mass n in hydrozoic acid (hn3)