How do elementary reactions differ from non-elementary reactions in terms of reaction orders?

Under what conditions do substrate coefficients equal reaction orders in a reaction?

Why is it important to experimentally determine individual reaction orders in non-elementary reactions?

What does the graph of a zero-order reaction typically look like?

Which of the following is an example of a first-order reaction?

Which scenario describes a second-order reaction?

For a reaction with reaction orders of 2 for A and 1 for B, what is the overall reaction order?