H4C2 is organic compound named 'Ethylene'! It contains two carbon atoms which have two hydrogen atoms bonded to each carbon! It is gas at room temperature!
H4C is commonly known as methylene, which is a chemical compound characterized by a carbon atom bonded to four hydrogen atoms. It is often represented in organic chemistry as the functional group -CH2-. However, it's important to note that in standard chemical nomenclature, H4C is not a stable or commonly referenced molecule.
The compound H4C is commonly known as methane or more specifically, it can also be referred to as tetracarbon hydride. However, the correct molecular formula for methane is CH4, indicating one carbon atom and four hydrogen atoms. If H4C is used in a different context, please provide more details for clarity.
Methane
Based on the naming rules for acids. This would be just hydrogen and carbon. H2C or H4C. BUT.. I do not know if this exists in nature, since carbon tends to form covalent bonds with hydrogen, not ionic. CH4 is methane, and CH2 is acetylene.