# The living, breathing Albert Einstein!

No matter how smart or brilliant we are, we are always breathing to keep ourselves alive. So here's a "breathing" question to ponder about, consider each breath that you take every single moment, approximately how many of the air molecules in the nearest (order of magnitude) this breath would also have been breathed by Albert Einstein during his lifetime $$1879 – 1955$$? The atmosphere is about $$8 km$$ thick and the density of air is about $$1 kg/m^3$$. The Earth’s radius is $$6.37 × 10^6$$ m. You may also assume that the air consists mainly of nitrogen with a molar mass of $$28 g$$. Instead of providing the guidelines, try and attempt to make reasonable assumptions for any other data that you may need! To avoid complications, assumptions can be based on ideal situations.

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