March 30, 2017

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N2O undergoes thermal decomposition at 730°C to nitrogen (N2) and oxygen (O2) via first-order kinetics with a half-life of 3.58 x 103 minutes. Calculate the time required for 90% of a sample of N2O to decompose at 730°C.

  • chemistry - ,

    I think this is the easiest way.
    k = 0.693/t1/2 and substitute k into the following:

    ln(No/N) = kt.
    I would call No = 100, then
    N = 10 (if 90% is gone)
    k from above
    t = solve for this. The unit will be the unit used for the half life to solve for k.

  • chemistry - ,

    i am so sad

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