We need to plot the points according to the equations above and identify which is linear.

- Since plotting on a graph can be a bit unreliable when using only pen and paper we will use the stat function of the calculator.
- We can't really see the graph but we have to calculate for R
^{2} - An R
^{2}that is very close to 1 (about 0.99) should mean that the plot is linear.

The gas-phase decomposition of NO_{2}, NO_{2} (g) → 2 NO (g) + O_{2} (g), is studied at 383 ^{o}C, giving the following data:

Time (s) | [NO_{2}] (M) |

0.0 | 0.100 |

5.0 | 0.017 |

10.0 | 0.0090 |

15.0 | 0.0062 |

20.0 | 0.0047 |

If
you used the method of initial rates to obtain the order
for NO_{2}, predict what reaction rates you would measure in the beginning of the reaction for initial concentrations of 0.200 M, 0.100 M, and 0.050 M NO_{2}.

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