How long does it take a 100 g sample of As-81 to decay to 6.25 g? (Half-life for As-81 is 33 seconds)
Added by Michael A.
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In this case, the half-life of As-81 is 33 seconds. We start with a 100 g sample and want to know how long it takes to decay to 6.25 g. 100 g decaying to 50 g is one half-life, or 33 seconds. 50 g decaying to 25 g is another half-life, or another 33 Show more…
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