David S. Wallens
David S. Wallens Editorial Director
9/8/20 3:03 p.m.

As gas sits around, parts of it evaporate and can escape the fuel container–and we say “parts of it” because gasoline is a fairly complex substance.

Gasoline is made up of aliphatic and aromatic hydrocarbons–let’s call them open chains and closed rings. The light ends…

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