The reaction X → products is second order in X and has a rate constant of 0.035 M−1s−1. If a reaction mixture is initially 0.45 M in X, what is the concentration of X after 155 seconds?

The concentration of X after 155 seconds is 0.13 M

Explanation:

Integrated rate law for second order kinetics is given by:

= initial concentration = 0.45 M

a= concentration left after time t = ?

k = rate constant =

t = time of decmposition = 155 s

Thus the concentration of X after 155 seconds is 0.13 M

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