chemistry

If the half-life of a first-order decomposition reaction is 24.2 minutes, how long will it take for 10.0 moles of the reactant to decompose so that only 2.5 mol remains?

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asked by Josh
  1. k = 0.693/t1/2
    ln(No/N) = kt
    No = 10.0
    N = 2.50
    K from above.
    Solve for t in minutes.

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    posted by DrBob222
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