Question

The zero order reaction 2N2O→2N2+O2 has the rate constant 5.8×10−4 mol/L/s. If the concentration of N2O at t=10 seconds is 0.152 mol/L, what was the initial concentration of N2O?

Answer 1

we have:

[N2O] = 0.152 M

t = 10.0 s

k = 5.8*10^-4 M/s

use integrated rate law for 0 order reaction

[N2O] = [N2O]o - k*t

0.152 = [N2O]o - 5.8*10^-4*10

[N2O]o = 0.158 M

Answer: 0.158 M