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A sample of drinking water collected from a suburban Boston municipal water system in 2002 contained 0.45 pCi/L of radon. Assume that this level of radioactivity was due to the decay of 222 Rn (half-life = 3.8 days)

What was the level of radioactivity of this nuclide in the sample?

How many disintegrations per hour would occur in 2.5 L of the water?

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Category:- Chemistry
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