AP Chemistrymediummcq1 pt
Which rate law is consistent with the elementary step 2NO₂ → N₂O₄?
A.rate = k[NO₂]²
B.rate = k[NO₂]
C.rate = k
D.rate = k[N₂O₄]
Explanation
Core Concept
For an elementary step, molecularity sets the rate law: two NO₂ molecules collide, giving second order. Coefficients only translate directly for elementary steps.
Correct Answer
Arate = k[NO₂]²
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