chemistry

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The reaction
Cl(g)+ O3(g) --> ClO(g)+ O2(g)
is the first-order in both reactants. Determine the pseudo-first-order and second-order rate constants for the reaction from the data in the table below if the initial ozone concentration was ..0000000000825 M or 8.25*10^-11 M.

Time [Cl](M)
0...... 5.6*10^-14
100.... 5.27*10^-14
600... 3.89*10^-14
1200... 2.69*10^-14
1850... 1.81*10^-14

The pseudo-first-order rate constant is 6*10^2. But I cant figure out the second order rate constant.

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