Understanding Chemical Equilibrium

Chemical equilibrium is a fundamental concept in chemistry that describes the state of a reversible reaction when the rates of the forward and reverse processes become equal, leading to constant concentrations of products and reactants. A classic example is the reaction between nitrogen and hydrogen to form ammonia: N₂ + 3H₂ <=> 2NH₃.

In this reaction, at what point can the concentrations of nitrogen, hydrogen, and ammonia remain constant over time?