I-125 sample : 5.80 mg
Half life (t1/2 ) = 60.25 days
we have, # half lives : t/t1/2 = 40 days / 60.25 days = 0.6639
thus , amount reamaining : 5.80 mg/ 20.6639 = 3.66 mg or 3.7 mg ( 2 significant digits ).
Iodine-125 is radioactive and has a half life of 60.25 days. How much of a 5.80...
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Iodine-125 is radioactive and has a half life of 60.25 days. How much of a 7.40 mg sample would be left after 243. days? Round your answer to 2 significant digits. Also, be sure your answer has a unit symbol. 0 0.0 X ?
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