H2 (g) + 2 ICl (g) → I2 (g) + 2 HCl (g)  The observed rate law is Rate = k [H2][ICl]. A proposed mechanism for this reaction is:    Step 1: H2 (g) + ICl (g) → HI (g) + HCl (g)  Step 2: HI (g) + ICl (g) → I2 (g) + HCl (g)    a) Which step is the rate-determining step?   b) What is the intermediate in this proposed reaction mechanism?  c) Draw an energy diagram for this proposed mechanism. Label the reactants, products,

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