J.R. S. answered 03/13/21
Ph.D. University Professor with 10+ years Tutoring Experience
Not sure what this question relates to, but yes, there can be more than one first order reaction if you mean in the universe. If you mean can a given reaction be more than just first order, the answer again is yes, because it can be first order with respect to one reactant, but zero or second order with respect to another reactant, etc. So, what do you mean by can there be more than one?

J.R. S.
03/14/21
Dakotah V.
I was referring to within a chemical reaction, if two reactants could both be first order. Like, if you had A + B -> C, could both A and B theoretically be first order reactants?03/13/21