Please help me with those questions. If you cant solve all, just let it go please.

I will give you a thumb up :)

1. Under certain conditions the chemical reaction NO2+O3NO3+O2 proceeds with a rate constant of 2M1s1. Give two combinations of nitrogen dioxide (NO2) and (O3) concentrations that both give a reaction rate of 10Ms1. The rate expression for this reaction is Rate =k[NO2][O3] 2. Instant cold packs work by dissolving ammonium nitrate in water as shown in the chemical reaction NH4NO3(s)NH4+(aq)+NO3(aq). This reaction cools the water inside the packet. Is heat a reactant or a product of this reaction? 3. Is the reaction in question \#2 exothermic or endothermic? 4. Give an example of an exothermic reaction that you encounter outside of the chemistry lab