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5. The half-life of radon-222 is 3.8 days. How much of a 100. kg sample is left after 15.2 days?(1 point)

User Joepin
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1 Answer

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* Half life is 3.8 days,

So, 15.2 days will have 4 half life (15.2/3.8).

So, the sample left after 15.2 days will be,

Therefore 6.25 kg of the sample left after 15.2 days.


100*(1)/(2)*(1)/(2)*(1)/(2)*(1)/(2)=6.25\text{ kg}

User Dencey
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