SOLUTION: A research assistant made 160 mg of radioactive sodium (Na^24) and found that there was only 20 mg left 45 h later.
(a) What is the half-life of Na^24?
(b) If the laboratory
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Question 936000: A research assistant made 160 mg of radioactive sodium (Na^24) and found that there was only 20 mg left 45 h later.
(a) What is the half-life of Na^24?
(b) If the laboratory requires 100 mg of Na^24 12 hours from now, how much Na^24 should the research assistant make now? (Ignore the 20mg she currently has)
Answer by josgarithmetic(39620) (Show Source): You can put this solution on YOUR website!
General model is
------use this to find the value for k.
You can return to this one, , to determine the half-life.
-
, maybe more accuracy than reasonable.
Your more specific decay model is .
Now you have a known N but you want to solve for .
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