Which are true regarding catalysts? Check all that apply. a. some speed up the rate of the reaction by orienting the reactants in such a way that more collisions are effective at producing a reaction b. some speed up the rate of the reaction by changing the mechanism by which the reaction occurs c. they take part in the reaction but do not appear in the overall equation

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A: The reaction given is, => C2H4 (g) + H2 (g) → C2H6 (g)

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A: The details solution for this is provided below in attach image.

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Q: average reaction rate

A: As we know, Average rate of reaction =∆C∆t∆C is the change in concentration.∆t is time interval