How many secondary carbons are in 22-dimenthylpentane?

In 22-dimethylpentane, the carbon chain consists of a five-carbon pentane backbone with two additional methyl groups attached to the second carbon. A secondary carbon is defined as a carbon atom bonded to two other carbon atoms. In this molecule, there are two secondary carbons: the second carbon (to which the methyl groups are attached) and the third carbon in the chain.