A normal breath takes in about 1.0 L of air. Assuming that air has an average molar mass of 28.8 g, and that its density is 0.97 g/L, how many molecules of air do you take in with each breath? A)2.0 × 10 ²² B)2.2 × 10 ²² C)5.8 × 10 ²³ D)1.7 × 10 ²⁵ E)1.8 × 10 ²⁵

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Quizplus · Accepted Answer

The number of moles of air in 1.0 L is:```n = m/M = (0.97 g) / (28.8 g/mol) = 0.0337 mol```The number of molecules of air in 1.0 L is:```N = n * N_A = (0.0337 mol) * (6.022 × 10^23 molecules/mol) = 2.0 × 10^22 molecules```

A Normal Breath Takes in About 1