Welcome to Westonci.ca, the ultimate question and answer platform. Get expert answers to your questions quickly and accurately. Connect with professionals ready to provide precise answers to your questions on our comprehensive Q&A platform. Discover in-depth answers to your questions from a wide network of professionals on our user-friendly Q&A platform.

If the half-life of uranium-235 is 7.04 x 10°y and 12.5 g of uranium-235 remain after 2.82 x 10°y,
how much of the radioactive isotope was in the original sample?