Elementary steps

[Bansi Amin 1D]

In elementary steps, how are we finding the order when we're writing the rate laws? Are they coming from the stoichiometric coefficients because these are elementary steps? Because I know that the order isn't related to the stoichiometric coefficient, but when doing the mechanism problems, that's what it seemed like.

[Riya Pathare 2E]

We use the coefficients in mechanisms/elementary steps but this is not valid for the overall reaction.

[Sarah Maraach 2K]

Yes, for problems in which we are finding the overall rate law using elementary steps, you would use the coefficients as the order of each individual step's rate law. For an overall rate law, you can't.