| [NO2] | Time (mins) |
| 0.700 M | 0 |
| 0.379 M | 4 |
| 0.258 M | 8 |
| 0.158 M | 16 |
| 0.115 M | 24 |
| 0.074 M | 40 |
To determine the rate of the reaction we first plot the data with [NO2] on the y-axis and time on the x-axis. The initial rate is obtained by determining the slope of the line tangent to t=0 on the graph. Notice in Experiment #2 the initial rate is 1.5 x 10-1 M/min.