Posted by sam on Friday, February 8, 2008 at 1:03pm.
There are 3.29g of iodine 126 remaining in a smple originally containing 26.3 g of Iodine  126 the half life of Iodine  126 is 13 days. How old is the sample?
At study hall test is after lunch and cant figure out htese 2 on my review packet

SCIENCE PLEASE HELP  bobpursley, Friday, February 8, 2008 at 1:34pm
WEll, follow the formula...
amountremaining=Original*e^(.692t/13)
3.29/26/3= e^(.692t/13)
take the ln of each side
.207 = .692t/13
solve for t in days.