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Nitrous oxide (N2O) is used as an anesthetic (laughing gas) and in aerosol cans to produce whipped cream. It is also a potent greenhouse gas. The decomposition of N2O is first order. It decomposes slowly to N2 and O2:

2 N2O(g) --> 2 N2(g) + O2(g)

How many half-lives will it take for the concentration of the N20 to reach 3.13% of its original concentration?

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There will be 3.13% of the original N2O concentration after the first half life.

The half life of the reaction is the time taken for the N2O to reach half of its initial concentration. We have to note that the N2O is also a very potent greenhouse gas.

Originally, we have 100% of the the N2O. After the first half life, we will have 50% N2O after the second half life, we will have 25% of N2O.

This implies that we will have 3.13% of the original N2O concentration after the first half life.

Learn more about half life:https://brainly.com/question/24710827