Question

what is meant by hci and 2hci​

Answer 1

Answer:

hydrogen chloride (HCl), a compound of the elements hydrogen and chlorine, a gas at room temperature and pressure. A solution of the gas in water is called hydrochloric acid.

Answer 2

Answer:

HCl means hydrochloric acid. It is a very commonly used and said in chemistry.

So, here is your answer...

HCl has only 1 molecule while 2 HCl has 2 molecules.

Hope it helps you! :)