Posted by duane on Friday, July 11, 2014 at 8:23pm.
A halflife of mercury195 is 31 hours. If you start with a sample of 5.00g of pure mercury195, how much of it will still be present after 93 hours?

science  bobpursley, Friday, July 11, 2014 at 10:32pm
three half lives?
what is 5*1/2*1/2*1/2 ? 
science  jarod, Monday, November 9, 2015 at 11:56pm
0.625