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In: Chemistry

A certain zero order reaction has a half live of 2.5 seconds when the initial concentration...

  1. A certain zero order reaction has a half live of 2.5 seconds when the initial concentration is 2.5 M. What concentration of the reactant remains after 4.5 seconds?

  2. The reaction shown below obeys second order kinetics with k = 2.50 x 10-3 M-1s-1 at 25 oC. If the initial concentration of A is 2.00 M, how long will it take for concentration of A to decrease to 35.0 % of its original value?

    A + A → products

  3. For a certain second order reaction, k = 0.075 M‒1s‒1. If 0.0025 M of reactant remains after 15 minutes, how much of the reactant was present initially?

  4. A certain reaction is known to be second order in [A]. What is the numerical value of k, the specific rate constant, if the concentration of [A] decreases from 1.50 M to 0.25 M after 225 seconds?

  5. A certain reaction is known to be second order in A with k = 0.95 M‒1s‒1. What is the numerical value of the half-life (τ1⁄2) when the initial concentration of A is 0.45 M?

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