Question

How many carboxylic acids have the formula $C_4{H}_8{O}_2$?

Answer 1

Answer
Two carboxylic acids have the formula $C_4{H}_8{O}_2$
Explanation :
We can rewrite the formula as $C_3{H}_{7}COOH$
$C_3{H}_7$ is a propyl group
We can put the $COOH$ group on the end of the propyl chain to get $C{H}_{3}C{H}_{2}C{H}_{2}COOH$
Or we can put the $COOH$ group in the middle of the propyl chain to get $\left(C{H}_3\right)CHCOOH$ , 2 - methylpropanoic acid