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Why are they dividing by 2 to find average?

Submitted by abhistud on Thu, 09/07/2017 - 03:33

Why are the dividing by 2 for the average rate? They should divide only when comparing, right? Where am I going wrong?

chemtopper

Tue, 09/26/2017 - 00:04

Look at the balanced equation  and check the coefficients 

1/2 Rate of disappearance of N2O5 = 1/4 rate of appearance of NO2