henryromero214 henryromero214 12-04-2018 Physics contestada The half-life of cobalt-60 is 5.3 years. If you have a sample that contains 10.0 g of the isotope, how much will be left after 15.9 years? A. 2.5 g B. 5.0 g C. 1.25 g D. 0.625 g