Asample of 0.900 mol n2o is placed in a sealed
container, where it decomposes irreversibly to n2 and o2
in a first-order reaction. after 42.0 min, 0.640 mol n2o
remains. how long will it take for the reaction to be
90.0% complete?

Explanation:

1. Decomposition reaction:

Chemical equation:

2. First order reaction:

Rate law:

Integrated rate law:

3. Determine the rate constant, k

4. Time taken for the reaction to be 90.0% complete

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