Answer:
0.684 M/s
Step-by-step explanation:
It will be proportional to the rate of formation of NH₃
The ratio of H₂ to NH₃ is 3 : 2 or ³/₂ according to the reaction equation
We can use find the rate of disappearance of H₂ like so:
³/₂ × 0.456 = 0.684