Final answer:
Methyl chloride is commonly known as CH3Cl
Step-by-step explanation:
The compound commonly known as methyl chloride is CH3Cl. It is named using the IUPAC naming system, which involves stating the name of the parent alkane as a substituent group (with the -yl suffix) and then the name of the halogen as if it were the anion. In this case, the alkane is methane (CH4) and the halogen is chlorine (Cl), resulting in the name methyl chloride.