Assume the reaction below 2NO(g)+O2(g)2NO2(g) proceeds via the following rate expression: t[NO]=k[NO]2[O2] Which of the following statements concerning the above chemical reaction and rate equation is/are CORRECT? 1. The reaction is second-order with respect to NO. 2. The rate of disappearance of O2 is two times the rate of appearance of NO2. 3. Aecording to the balanced chemical equation, the reaction is fifth-order overall. 2 and 3 2 only 1 only. 3 only 1 and 3