Solar winds composed of free protons, electrons, and particles bombard Earth constantly, knocking gas molecules outof the atmosphere. In this way, Earth loses about 3.0 kg of mat-ter per second. It is estimated that the atmosphere will be gone inabout 50 billion years. Use this estimate to calculate (a) the mass(kg) of Earth’s atmosphere and (b) the amount (mol) of nitrogen,which makes up 75.5 mass % of the atmosphere.

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