The reaction between C3H4, AgNO3, and NH3 would likely result in the formation of a silver acetylide complex. The specific chemical equation for this reaction would be:

C3H4 + AgNO3 + NH3 → AgC2H + HNO3

In this reaction, the acetylene molecule (C3H4) reacts with silver nitrate (AgNO3) and ammonia (NH3) to form silver acetylide (AgC2H) and nitric acid (HNO3) as a byproduct. Silver acetylide is a complex compound that is formed when silver ions react with acetylene.