Consider this reaction 2NO_2 (g) + F_2(g) rightarrow 2NO_2F(g) The rate equation

Question

Consider this reaction 2NO_2 (g) + F_2(g) rightarrow 2NO_2F(g) The rate equation for this reaction is: rate =k [NO_2] [F_2] Which mechanism is consistent with the rate law? 2NO_2 (g) + F_2(g) rightarrow 2NO_2F(g) NO_2 (g) + F_2(g) rightarrow NO_2F(g) + F(g) NO_2(g) + F(g) rightarrow NO -2 + F(g) F_2(g) rightarrow 2F(g) 2NO_2 (g) + 2F(g) rightarrow 2NO_2F(g) NO_2(g) + F_2(g) rightarrow NO_2 F(g) + F(g) NO_2 (g) + F(g) rightarrow NO F(g) The decomposition of hydrogen peroxide is described by the equation: 2H_2O_2(aq) rightarrow 2H_2O(l) + O_2(g) The reaction is first order in H_2O_2. It takes 10.0 hours for the concentration of H_2O_2 to drop from 0.500 M to 0.250 M. How many hours are required for the concentration of H_2O_2 to drop from 0.400 M to 0.100 M? 38.0 h 24.0 h 20.0 h 12.0 h

Explanation / Answer

8 - option D because rate of the reaction involves NO2 and F2. That means, they reacts slow compared to other reactions.

9 - option C is correct

If the reactant concentration decreasing 0.5 M to 0.25 M in 10 h means The half life of reaction is 10h. or in 10 h the concentration will be half.

so from 0.4 M to 0.1 M, there will be two half lifes. in first 10 h, 0.4 becomes 0.2 M and in the second 1o h, 0.2 M becomes 0.1 M. so total time will be 20 h

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