<Tr> <Th_colspan="2"> Properties </Th> </Tr> <Tr> <Td> Chemical formula </Td> <Td> </Td> </Tr> <Tr> <Td> Molar mass </Td> <Td> 280.45 g mol </Td> </Tr> <Tr> <Td> Appearance </Td> <Td> Colorless oil </Td> </Tr>

Draw the skeletal formula of linolenic acid. why is it an unsaturated fatty acid