A reaction that is second-order in one reactant has a rate constant of 2.0 × 10-2 L/(mol · s). If the initial concentration of the reactant is 0.340 mol/L, how long will it take for the concentration to become 0.170 mol/L?
1/At -1/A0 = kt
So 1/0.170 -1/ 0.34 = 0.02 t
Therefore t = 5.882 - 2.941 /0.02
t=. 14.7 seconds
Answer: 14.7 seconds
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