Question

question 9 · 1 point
identify the carboxylic acid group and hydrocarbon chain for the fatty acid whose structure is shown below.
select the correct answer below:
in the given structure of fatty acids, there is one cooh group and 17 carbons present.
in the given structure of fatty acids, there are two cooh groups and 19 carbons present.
in the given structure of fatty acids, there is one cooh group and 22 carbons present.
none of the above

Explanation:

Step1: Identify the carboxylic acid group

The carboxylic acid group is \( -COOH \). In the given structure, there is one \( -COOH \) group (the part with \( -C=O \) and \( -OH \) attached to the same carbon).

Step2: Count the number of carbon atoms

Each vertex (corner) in the zig - zag line (hydrocarbon chain) represents a carbon atom. Counting the carbon atoms in the hydrocarbon chain:

• The cyclic part (hexagon - like structure) has 6 carbon atoms.
• The straight - chain part: Let's count the carbon atoms one by one. After the cyclic part, we have a chain. Counting from the cyclic part to the \( -COOH \) group, we find that in total, there are \( 21 \) carbon atoms in the hydrocarbon chain plus the carbon in the \( -COOH \) group. So, there are \( 22 \) carbon atoms in total.

Answer:

In the given structure of fatty acids, there is one \( COOH \) group and \( 22 \) carbons present.