AP Chemistry Warm-up #2

Gaseous ammonia is synthesized from nitrogen and hydrogen.

1) Write a balanced chemical reaction:
             N₂ + 3H₂ ----> 2NH₃

2) If you take 355 L of hydrogen gas at 25.0 Celsius and 542 mm Hg and
    combine it with excess nitrogen gas, what is the theoretical yield of
    ammonia?

3) If the ammonia occupies a 125 L tank at 25.0 Celsius, what is its
     pressure?