A mixture of NH₃(g) and N₂H₄(g) is placed in a sealed container at 300 K. The total pressure is 0.50 atm. The container is heated to 1200 K, at which time both substances decompose completely according to the equations 

After decomposition is complete, the total pressure at 1200 K is found to be 4.5 atm. Find the percent of N₂H₄(g) in the original mixture. (Assume two significant figures for the temperature.)

Transcribed Image Text:

2 NH3(g) N₂(g) + 3 H₂(g); N₂H4(8) N₂(g) + 2 H₂(g).