AP Chemistryeasymcq1 pt
For the reaction 2NO₂ → 2NO + O₂, the rate law is rate = k[NO₂]². If [NO₂] is halved, what happens to the rate?
A.It drops to one-fourth
B.It halves
C.It doubles
D.It is unchanged
Explanation
Core Concept
Second order: rate scales with the square of concentration, (½)² = ¼. Halving [NO₂] quarters the rate.
Correct Answer
AIt drops to one-fourth
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