College Chemistry
posted by cara .
The following data are obtained for the decomposition of N2O5 at a certain temperature:
2N2O5(g)↔4NO2(g) + O2(g)
Time(s) 0 200 400 600 800
N2O5 (atm) 2.10 1.85 1.63 1.43 1.26
Find the rate constant kobs for this firstorder decomposition reaction in sec1
So far I have two equations that I think are needed: ln([At]/[Ao])=kt and PV=nRT but how to proceed?

I believe you need to plot the data and determine the slope of the straight line. Plot ln A vs time.

But A stands for concentration..how would i obtain it from the data given?

Consider a .0500m solution.HClO2such that36% of the molecules dissociated when dissolved in water. Calculate the vant Hoff factor for this solution is hclo2 is36% associated