The molar mass of the limiting monobasic carboxylic acid is 116 g / mol. What is its molecular formula?

Let’s implement the solution:
1. According to the condition of the problem, the molar mass of the organic acid is known:
M (CxHyOz) = 116 g / mol.
2. Let us write down the general formula of the limiting monobasic acid:
CnH2n + 1COOH
Let’s make calculations:
12n + 2 + 1 + 12 + 16 * 2 + 1 = 116;
12n = 116 – 48;
12n = 68;
n = 5.6;
C5H11COOH;
M (C5H11COOH) = 12 * 5 + 12 * 1 + 12 + 16 * 2 = 116 g / mol.
Answer: С5Н11СООН – pentanoic acid (valeric acid).