If the rate law of a chemical reaction is k[NH4+]2[NO2–], what is the order of the reaction?

Question

1. The order of the reaction cannot be determined.
2. 3
3. 1
4. 2

I know that the order for NH4+ should be 2 and NO2- should be 1. Does that make it 3?

Answer 1

yes. 2+1 = 3