Question

Part A A rock contains 0.102 mg of lead-206 for each milligram of uranium-238. The half-life for the decay of uranium-238 to lead-206 is 4.5 109 yr. The rock was formed years ago. 5.02. 108 3.81 108 7.23.108 4.59 108 5.49. 108 Request Answer Submit

Answer 1

On2 to 5 sn (os) none = 4.5x10°go en Color + 238) In 2 238 238 t = 7•23 x 10 8 yr Cansuere c) du = ln2 at - In (NOING) - In2 x 598. en (ta) 3.887 (Answer. a) = 28.8 yro