Homework Help: chemistry

Posted by monique n on Wednesday, December 8, 2010 at 6:37pm.

Iodine-131 is used to destroy thyroid tissue in the treatment of an overactive thyroid. the half-life of iodine-131 is 8.02 days. if a hospital recieves a shipment of 200.0g of iodine-131, how much iodine-131 would remain after 32 days?

chemistry - DrBob222, Wednesday, December 8, 2010 at 7:41pm
k = 0.693/t1/2
Sustitute into the equation below.
ln(No/N) = kt
No is 200.0g
N = what remains.
t is 32 days.
chemistry - monique n, Wednesday, December 8, 2010 at 8:40pm
how did you get .693?

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