Laughing Gas Nitrous oxide (N2O) is used as an anesthetic (laughing gas) and in aerosol cans to
produce whipped cream. It is a potent greenhouse gas and decomposes slowly to N2 and O2:
2 N2O(g) → 2 N2(g) + O2(g)
a. If the plot of ln[N2O] as a function of time is linear, what is the rate law for the reaction?
b. How many half-lives will it take for the concentration of N2O to reach 6.25% of its original
concentration?
[Hint: The amount of reactant remaining after time t (At) is related to the amount initially present
(A0) by the equation At/A0 = (0.5)n, where n is the number of half-lives in time t.]
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