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The Brainliest Answer!
The rate of reaction is the change in the concentration of any one of the reactant or produvt per unit time.
Rate of reaction=Decrease in the conc. of a reactant R    =
                                 time interval
Increase in conc. of product P
   time interval
Fist order reaction
1)NH4NO2------------------------ N2+ 2 H2o
Rate of reaction=-d(NH4NO2)/dt=d(N2)/dt=d(H2o)/2 dt
ii)H2O2-------------------------------- H20 + 1/2 O2
Rate of reactoin=-d(H2o2)/dt = d(H2o)/dt= 2d(o2)/dt

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