what would be the name for Hsubscript 2 S?
hydrogen sulfide gas? If it is in water solution, it has another name.
what do you mean "if it is in a water solution it has another name"?
You can't mix gas with water.
You can change compounds from solid to liquid to gas, by heating it or cooling it.
Is there another compound used to condense the hydrogen sulfide into a liquid? If so you just add that compound to the name.
If you aren't adding anymore elements to the mixture then the name doesn't change.
State the question you are being asked and I'll help better.
I apologize for the confusion in my previous response. Hydrogen sulfide (H2S) is a gas at standard temperature and pressure. When it is dissolved in water, it forms an aqueous solution called "hydrogen sulfide solution."
To clarify, when H2S is dissolved in water, it does not change its chemical composition but rather forms a solution. The name doesn't change because the compound itself remains the same, but we use a different term to indicate its state in the water solution.