Integrated Science
7th Edition
ISBN: 9780077862602
Author: Tillery, Bill W.
Publisher: Mcgraw-hill,
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Chapter 11, Problem 6PEB
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The time required to reduce the
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Chapter 11 Solutions
Integrated Science
Ch. 11.1 - Prob. 1SCCh. 11.1 - Prob. 2SCCh. 11.1 - Prob. 3SCCh. 11.1 - Prob. 4SCCh. 11.1 - Prob. 5SCCh. 11.1 - Prob. 6SCCh. 11.1 - Prob. 7SCCh. 11.1 - Prob. 8SCCh. 11.1 - Prob. 9SCCh. 11.2 - Prob. 10SC
Ch. 11.2 - Prob. 11SCCh. 11.3 - Prob. 12SCCh. 11 - How is a radioactive material different from a...Ch. 11 - Prob. 2CQCh. 11 - Prob. 3CQCh. 11 - Prob. 4CQCh. 11 - What is half-life? Give an example of the...Ch. 11 - Prob. 6CQCh. 11 - Prob. 7CQCh. 11 - Prob. 8CQCh. 11 - Prob. 9CQCh. 11 - Prob. 10CQCh. 11 - Prob. 11CQCh. 11 - Prob. 12CQCh. 11 - Prob. 13CQCh. 11 - Prob. 14CQCh. 11 - Prob. 15CQCh. 11 - Prob. 16CQCh. 11 - Prob. 17CQCh. 11 - Prob. 1PEACh. 11 - Prob. 2PEACh. 11 - Predict if the nuclei in exercise 1 are...Ch. 11 - Prob. 4PEACh. 11 - Prob. 5PEACh. 11 - Prob. 6PEACh. 11 - Prob. 7PEACh. 11 - Prob. 1PEBCh. 11 - Prob. 2PEBCh. 11 - Prob. 3PEBCh. 11 - Prob. 4PEBCh. 11 - Prob. 5PEBCh. 11 - Prob. 6PEBCh. 11 - Prob. 7PEB
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- 4.3 The radioactive cobalt isotope, Co, has an half-life of 63 months and undergoes decay. The molar mass of 6°Co is 59.9338222 amu. A sample initially contains 48 mg of 6°Co. (a) Calculate the number of moles of 6Co that are left in the sample after 5.0 years. (b) Calculate the activity of 60CO after 5.0 years, in units of per month (month).arrow_forwardIf you start with 7.0×1010I7.0×1010I-131 atoms, how many are left after approximately 1 month? II-131 has a half-life of 8.0 days.arrow_forwardCopper-63 has a nucleus mass of 62.92959 u. Its atomic number is 29, and its atomic mass number is 63. The mass of a proton is 1.007276 u and the mass of a neutron is 1.008664 u What is the total binding energy of the nucleus? Express your answer in MeV and keep 4 significant digits.arrow_forward
- Radioactive element AA can decay to either element BB or element CC.The decay depends on chance, but the ratio of the resulting number of BB atoms to the resulting number of CC atoms is always 2/1.The decay has a half-life of 8.00 days.We start with a sample of pure AA. How long must we wait until the number of CC atoms is 1.50 times the number of AAatoms?arrow_forwardTritium (t1/2 = 12.33 y) is mostly produced for military purposes. The United States stopped producing tritium in 1988 but resumed in 2003. In 1996 it was reported that the United States had only 75 kg of tritium stockpiled. If none of it was used by 2003, how much tritium remained?arrow_forwardThe half-life of americium-241 is 457 years. What is the activity in curies of a 0.010g of sample of Am-241? (1 Ci = 3.700 x10^10 atom/s)arrow_forward
- What is the mass of 25.0 mCi of technetium-99m (Tc99m)Tc99m , which has a half-life of 6.00 h?arrow_forwardA 1.00 g sample of samarium emits alpha particles at a rate of 120 particles/s. The responsible isotope is 147Sm, whose natural abundance in bulk samarium is 15.0%. Calculate the half-life.arrow_forwardThe radioactive cobalt isotope, 60Co, has an half-life of 63 months and undergoes decay. The molar massof 60Co is 59.9338222 amu. A sample initially contains 48 mg of 60Co.(a) Calculate the number of moles of 60Co that are left in the sample after 5.0 years. (4)(b) Calculate the activity of 60Co after 5.0 years, in units of per month (month1).arrow_forward
- The barium isotope 133Ba has a half-life of 10.5 years. A sample begins with 1.0 × 1010 133Ba atoms. How many are left after (a) 2 years, (b) 20 years, and (c) 200 years?arrow_forwardPhosphorus-32 is a beta emitter with a decay constant of 3,6x107 s'. For a particular application, the phosphorus-32 emits 2.0x10" beta particles every second. Determine a. The half-life of the phosphorus-32. b. The mass of pure phosphorus-32 will give this decay rate. (Given the Avogadro constant, NA =6.02 ´ 1023 mol·')arrow_forwardMantles for gas lanterns are made of thorium, because it forms an oxide that can survive being made incandescent for long periods of time. Natural thorium is almost 100% 232Th, with a half-life of 1.405 ✕ 1010 y. If the average lantern mantle contains 350 mg of thorium, what is its activity?=____Bqarrow_forward
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