Write the formula for a volatile hydrogen compound.

Any chemical element that is not a metal will have the formula of a volatile hydrogen compound if it is substituted into the general formula under the elements of the periodic table.
Thus, you can get the formula for methane (RH4 – CH4), ammonia (RH3 – NH3), hydrogen sulfide (RH2 = H2S) and other volatile hydrogen compounds. In these formulas, the letter R denotes any chemical in the column above that general formula.

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