Gasoline is a mixture of the alkanes and unlike many chemicals, can be stored for long periods and transported without problem. It is only when ignited that it has enough energy to continue reacting. This property makes it difficult for alkanes to be converted into other types of organic molecules.
Recovery from being spayed is usually around 10 days. My kitten was back to her usual self in three days but it took 10 days for the incision to heal enough for the stitches to come out.
Cats can be spayed/neutered as long as they weigh at least 2lbs, are 8 weeks old, and are healthy. My friend does a lot of spay/neuter clinics in low cost areas and a neuter is extremely easy (it literally takes 10-15 minutes). I've had first hand experience seeing kittens spayed at 10 weeks.