In chemical structure, arachidonic acid is a carboxylic acid with a 20-carbon chain and four cis double bonds.
In Biology, arachidonic acid is a polyunsaturated fatty acid that is present in the...
The burning of coal or oil rich in sulpher releases SO3 to the atmosphere. This combines with water to form Sulpheric acid a strong acid. SO3 + H2O -> H2SO4