Each time you inhale, you take in about 500 mL (two significant figures) of air, each milliliter of which contains 2.5 × 1019 molecules. In delivering the Gettysburg Address, Abraham Lincoln is estimated to have inhaled about 200 times.
(a) How many molecules did Lincoln take in?
(b) In the entire atmosphere, there are about 1.1 × 1044 molecules. What fraction of the molecules in the earth’s atmosphere was inhaled by Lincoln at Gettysburg?
(c) In the next breath that you take, how many molecules were inhaled by Lincoln at Gettysburg?
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