Final answer:
The likely structure of compound B is a long chain of 23 carbon atoms with a carboxylic acid group at one end.
Step-by-step explanation:
The compound B C23H46 is a sex attractant of the common housefly. It gives two products when broken down: Ch3(cH2)12COOH and CH3(CH2)7COOH. Based on this information, we can suggest the likely structures of B.
The compound B can be broken down into two components, one with a 12-carbon chain and one with a 7-carbon chain. This suggests that compound B consists of a long hydrocarbon chain with a carboxylic acid group.
Therefore, the likely structure of B is a long chain of 23 carbon atoms with a carboxylic acid group at one end.