Nitrogen dioxide gas dissociates to give nitric oxide and oxygen. For this reaction, when a graph is ploted between concentration of `NO_(2)` and time, the slope of tangent drawn at time t=10 s is found to be `6.8xx 10^(-4)` mol `L^(-1) s^(-1)` .predict the slope of the graph at t=10s when the concentration of NO and `O_(2)` are plotted against time. Justify your answer.