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

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Chemistry

  1. A certain zero order reaction has a half live of 2.5 secondswhen the initial concentration is 2.5 M. What concentration of thereactant 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 is2.00 M, how long will it take for concentration of A to decrease to35.0 % of its original value?

    A + A → products

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

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

  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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