Hey, I'd love to help, Where's the Question at tho?
or do you mean h2o? if so here is my definition
What is 2ho? 2HO is 2 moles of Hydrogen oxide, which has 2 moles Hydrogen and 2 moles oxygen. 2HO means 2 hydrogen and 2 oxygen,H2O means only 2 hydrogen and 1 oxygen
-Millie