Question

what is the chemical formula of hydrogen carbide?

Answer 1

Carbide is the compound containing carbon and less electronegative element.
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Hydrogen Carbide means compound containing hydrogen and carbon.
As carbon valency is 4
Hydrogen valency is 1
So Formula of hydrogen Carbide is:
H4C
It is also known as Methane.
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Answer 2

The chemical formula of Hydrogen Carbide is H4C or CH4 which is also known as Methane gas a hydrocarbon compound.
Valency of Hydrogen is 1 and valency of carbon is 4 thus they combine to form CH4 hydrogen carbide.