Final answer:
The expanded structure of CH₃CH(CH₃)CHBrCH₂COOH shows a chain of carbon atoms with a bromine atom and a carboxylic acid functional group. The structure can be written as: H₃C-CH₂-C(H₃C)-CHBr-CH₂-COOH.
Step-by-step explanation:
The expanded structure of CH3CH(CH3)CHBrCH2COOH displays the connectivity and arrangement of its atoms. This molecule is made up of a chain of carbon atoms where one carbon is bonded to a bromine atom (Br) and the terminal carbon is part of a carboxylic acid group, COOH. In the expanded structure, each carbon atom is shown with its respective hydrogen atoms or substituents.
An example of this expanded structure appears as follows:
H3C-CH2-C(H3C)-CHBr-CH2-COOH
Each carbon atom is tetrahedral in molecular geometry, meaning it is connected to four different groups. In this case, the carbon that is part of the CH(CH3) group has a methyl group (CH3) as a substituent. The COOH indicates a carboxylic acid functional group, which consists of a carbonyl (C=O) and a hydroxyl (OH) group.