# Knowing that a reaction has multiple steps?

by pierce15
Tags: knowing, multiple, reaction, steps
 P: 242 Hello, is there a way to eliminate the possibility of a reaction having one single step? For example, the reaction $$NO_2(g) + CO(g) \to NO(g) + CO_2 (g)$$ appears to me to be single stepped, but my textbook gives the reaction in multiple steps and does not elaborate on how the individual steps were found. Also, I apologize for the triviality of this question; I'm only in high school chemistry.