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The rate constant of a zero order reaction is 2.0 10⁻² ~mol ~L ⁻¹ ~s ⁻¹ . If the concentration of the reactant after 25 seconds is 0.5 M . What is the initial concentration?

Options

  1. A0.5 M
  2. B1.25 M
  3. C12.5 M
  4. D1.0 M

Correct answer

D. 1.0 M

Step-by-step solution

For a zero order reaction aligned & Rate constant = k = a-x t & 2 10⁻²= a-0.5 25 & a-0.5=0.5 & a=1.0 M aligned

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