What is the number of > C = C < bonds present in a linolenic acid molecule?

Step-by-step solution

Linolenic acid is an essential polyunsaturated -3 or -6 fatty acid containing 18 carbon atoms. The systematic name octadecatrienoic acid specifically denotes three carbon-carbon double bonds in the hydrocarbon chain, as indicated by the suffix -trienoic . Both -linolenic acid ( all-cis-9,12,15-octadecatrienoic acid ) and -linolenic acid ( all-cis-6,9,12-octadecatrienoic acid ) share this structural feature. The molecule thus contains three C=C bonds.