What fraction of the mass of air does the radon constitute

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Reference no: EM13979400

Indoor air pollution. Uranium is naturally present in rock and soil. At one step in its series of radioactive decays, 238U produces the chemically inert gas radon-222, with a half-life of 3.82 days. The radon seeps out of the ground to mix into the atmosphere, typically making open air radioactive with activity 0.3 pCi/L. In homes,²²²Rn can be a serious pollutant, accumulating to reach much higher activities in enclosed spaces. If the radon activity exceeds 4 pCi/L, the Environmental Protection Agency suggests taking action to reduce it, such as by reducing infiltration of air from the ground.

(a) Suppose that the activity is actually 5.7 pCi/L. Convert this to units of becquerel per cubic meter.

(b) How many ²²²Rn atoms are in one cubic meter of air displaying this activity?

Reference no: EM13979400

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