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Approximately how many times faster or slower is the average reaction rate during the first four seconds (t = 0 to t = 4) than

Approximately how many times faster or slower is the average reaction rate during the first four seconds (t = 0 to t = 4) than the second four seconds (t = 4 to t = 8) for the following reaction?

2NOBr(g) Br2(g) + 2 NO(g)

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