Dinitrogen pentoxide decomposes to `NO_(2)` and `O_(2)` following first order kinetics `N_(2)O_(5)(g) rarr 2NO_(2)+O_(2)(g)`
0.2 mole of `N_(2)O_(5)` was taken in 2L vessel and heated at 200K. The concentrated of `N_(2)O_(5)` is measured at different intervals . Following graphs A and B were obtained from the data.

Calculate the rate of reaction after `5 xx 10^(-3) s`

Options

A. `6.84 mol L^(-1) s^(-1)`
B. `3.42 mol L^(-1) s^(-1)`
C. `6.84 mol L^(-1)`
D. `6.84 mol s^(-1)`

Answer

A