List the methods of separation used in water purification ( HELP PLEASE )

What semimetal can form four single covalent bonds.

Transportation is the largest single source of air pollution in the united states. air pollution can harm the environment and human health. which technology could offer a solution to this problem? mufflers that reduce noise motors that run on electricity tires that improve gas mileage

Identify a strong intermolecular force of attraction between an alcohol