Posted by David on .
Carbon14 has a halflife of 5730 y. How much of a 144 g sample of a carbon14 will remain after 1.719 (times) 10 4y?

Chemistry 
DrBob222,
See your other radioisotope problem. Most of these follow the same procedure; this one is a little different but uses the same formulas. Post with explanation if you can't get it.