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The rate constant for this first order reaction is 0.0470 s-1 at 400 C.

A TO Products

After how many seconds will 11.0% of the reactant remain?

  • Chemistry -

    This is the long way around but this is what I would do.
    ln(No/N) = kt
    I would call No = 100
    Then N would be 11.
    Substitute k and solve for t in seconds.

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