A study of the decomposition reaction of hydrogen peroxide was carried out:

H2O2 H2O+ 12 O2

For this, the experimental data of its concentration as a function of time were tabulated:

a) Calculate the instantaneous rate of disappearance of hydrogen peroxide at t=2000

b) Calculate average at t=1200

c) Write the rate expression for the reaction

\begin{tabular}{|c|c|} \hline t(s) & {[H2O2](mol/L)} \\ \hline 0 & 2,32 \\ \hline 400 & 1,72 \\ \hline 800 & 1,30 \\ \hline 1200 & 0,98 \\ \hline 1600 & 0,73 \\ \hline 2000 & 0,54 \\ \hline 2400 & 0,39 \\ \hline 2800 & 0,28 \\ \hline \end{tabular}