Final answer:
The order of the reaction with respect to H₂ is 1.
Step-by-step explanation:
Comparing experiments 2 and 3: The concentration of H₂ was doubled while the concentration of NO was held constant. The initial rate of the reaction doubled, since = 2. Therefore, the order of the reaction with respect to H₂ is 1, or rate x [H₂]¹. Beca se 2¹ = 2, the doubling of H₂ results in a rate that as great. The overall rate law then includes both of 1.00×10-4 5.00x107 these results.