AP Chemistryeasymcq1 pt
What is the molecularity of the elementary step H₂ + I → 2HI?
A.Bimolecular
B.Unimolecular
C.Termolecular
D.Zeromolecular
Explanation
Core Concept
Two reactant particles (H₂ and I) collide in this step, so it is bimolecular and its rate law is rate = k[H₂][I].
Correct Answer
ABimolecular
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