Find the formula for a carboxylic acid with a molecular weight of 102.

Let’s execute the solution:
1. Let’s write down the general formula of carboxylic acids: СnH2n + 1COOH, abbreviated formula: CxHyOz.
2. The molecular weight of the organic acid is known according to the condition: M (CxHyOz) = 102 g / mol.
3. Determine the molecular formula:
12n + 2 + 1 + 12 + 16 * 2 + 1 = 102;
12n = 100 – 48;
12n = 54;
n = 4.5 that is approximately equal to 5;
С5Н10О2 – pentanoic acid or valeric acid, refers to carboxylic acids.
CH3 – (CH2) 3 – COOH is an abbreviated formula.
Answer: valeric acid is used in medicine as a drug for the treatment of the gastrointestinal tract – C4H9COOH.