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The total lung capacity of a typical adult is 4.5 L . Approximately 20% of the...

The total lung capacity of a typical adult is 4.5 L . Approximately 20% of the air is oxygen.

At sea level and at a body temperature of 37∘C, how many oxygen molecules do the lungs contain at the end of a strong inhalation?

Express your answer using two significant figures.

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