Mercury-197 is used for kidney scans and has a half-life of 3 days. if the amount of mercury-197 needed for a study is 1.0 grams and the time allowed for shipment is 15 days, how much mercury-197 will need to be ordered.
chemistry - bobpursley, Wednesday, December 8, 2010 at 6:44pm
That is five half-lives
amount needed=1*2^5=32 grams