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Chemistry
10th Edition
ISBN: 9781305957404
Author: Steven S. Zumdahl, Susan A. Zumdahl, Donald J. DeCoste
Publisher: Cengage Learning
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Write the equation describing the beta decay associated with the carbon-14 isotope and write the rate law for the beta decay of the carbon-14 isotope.
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- The Cs-131 nuclide has a half-life of 30 years. After 120 years, 3.0 g remain. What is the original mass of the Cs-131 sample in grams?arrow_forwardThe Cs-131 nuclide has a half-life of 30 years. After 120 years, 2.2 g remain. What is the original mass of the Cs-131 sample in grams?arrow_forwardThe only stable isotope of iodine is iodine-127. Predict the mode of decay of iodine- 125. Write the corresponding nuclear reaction that occurs as the radioactive isotope, iodine-125 decays to a more stable form.arrow_forward
- Even though plutonium−239 (t1/2 = 2.41 × 104 yr) is one of the main fission fuels, it is still a radiation hazard present in spent uranium fuel from nuclear power plants. How many years does it take for 94% of the plutonium−239 in spent fuel to decay?arrow_forwardNext step of the neptunium-237 decay series, very unstable francium-221 is produced. The half-life of francium-221 is only 5.00 minutes, if the initial mass of francium-221 in a sample is 6.12 grams, how much francium-221 (in grams) will remain after 6.42 minutes?arrow_forward2. Xenon-125 undergoes radioactive decay. The half-life of the decay is 16.9 hours. How much of a 55 mg xenon-125 sample remains after 95 hours?arrow_forward
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