Question

identify the name of the carboxylic acid derived from alkane butane.
select the correct answer below:
methanoic acid
ethanoic acid
propanoic acid
butanoic acid

Explanation:

Carboxylic acids are named by replacing the -e of the corresponding alkane with -oic acid. Butane has 4 carbon atoms. Methanoic acid (1 C), ethanoic acid (2 C), propanoic acid (3 C), and butanoic acid (4 C). Since we need the acid from butane (4 C), it's butanoic acid.

Answer:

butanoic acid