CH3(CH2)16COOH
I think Sorry if I'm wrong
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The chemical composition of vegetable oil can vary depending entirely on what blend of fatty acids it is made from.
Canola Oil, for example made from rapeseed, is the formula is
C3H5O6C(CnH(2n+x))3
where,
n = 15, 17, 19 or 21 x= plus or minus 1. -3, or -5