# Phenol commonly known as carbolic acid

Phenol commonly known as carbolic acid, was used by Joseph Lister as an antiseptic for surgery in 1865. Its principal use today is in the manufacture of phenolic resins and plastics. Combustion of 5.23 mg of phenol yields 14.67 mg $CO_2$ and 3.01 mg $H_2O$. Phenol contains only C, H, and O. What is the percentage of each element in this substance?