If the nitrous oxide to oxygen ratio is 2:1, what percentage of the mixture is nitrous oxide?

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Multiple Choice

If the nitrous oxide to oxygen ratio is 2:1, what percentage of the mixture is nitrous oxide?

Explanation:
In gas mixtures, ratios are parts by volume, so to find the percentage of one gas you divide its part by the total parts and multiply by 100. A nitrous oxide to oxygen ratio of 2:1 means 2 parts N2O and 1 part O2, for a total of 3 parts. The nitrous oxide portion is 2/3 of the mixture, which is 66.7%. So nitrous oxide makes up about two-thirds of the mixture, with the rest being oxygen.

In gas mixtures, ratios are parts by volume, so to find the percentage of one gas you divide its part by the total parts and multiply by 100. A nitrous oxide to oxygen ratio of 2:1 means 2 parts N2O and 1 part O2, for a total of 3 parts. The nitrous oxide portion is 2/3 of the mixture, which is 66.7%. So nitrous oxide makes up about two-thirds of the mixture, with the rest being oxygen.

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