What is the chemical formula for R22?

The correct chemical formula for R22 is CHClF2. R22, also known as chlorodifluoromethane, is categorized as a hydrochlorofluorocarbon (HCFC). The formula indicates that it contains one carbon atom (C), one chlorine atom (Cl), and two fluorine atoms (F).

Understanding the structure is important in the context of refrigerants. R22 is significant in refrigeration and air conditioning due to its thermodynamic properties, which make it effective for heat transfer.

The other options do not accurately reflect the composition of R22. For instance, CF2Cl2 refers to a different refrigerant, R12, while CCl2F2 corresponds to R12 as well, which has a different ratio of chlorine, carbon, and fluorine atoms. Therefore, CHClF2 is the only formula that correctly represents R22.