Chemical Kinetics Questions

A reaction was found to be second order with respect to the concentration of carbon monoxide. If the concentration of carbon monoxide is doubled, with everything else kept the same, the rate of reaction will:

Rate of a reaction can be expressed by Arrhenius equation as $k=A{e}^{-E_a/RT}$. In this equation, $E_a$ represents:

The following mechanism has been proposed for the reaction of $\text{NO}$ with ${\text{Br}}_2$ to form $\text{NOBr}$:$\text{NO}(g)+{\text{Br}}_2(g)\rightleftharpoons {\text{NOBr}}_2(g)\text{ (fast)}$${\text{NOBr}}_2(g)+\text{NO}(g)\to 2\text{NOBr}(g)\text{ (slow)}$ If the second step is the rate determining step, the order of the reaction with respect to $\text{NO}(g)$ is: