Final answer:
The compound in question is ammonium sulfide. It is created by the reaction of gaseous ammonia with sulfuric acid.
Step-by-step explanation:
The compound in question is ammonium sulfide.
The ammonium ion has a 1+ charge, and the sulfide ion has a 2- charge. Because of the charges, two ammonium ions are needed to balance the charge on a single sulfide ion, resulting in the formula (NH4)2S. Therefore, the compound is called ammonium sulfide.
Ammonium sulfide can be prepared industrially by the reaction of gaseous ammonia with sulfuric acid, resulting in the formation of ammonium sulfate.