Determine the half-life (in s) of a radioactive sample that contains 1.50 x 1015 atoms and has an activity of 6.60 x 1011 Bq.
Q: Two radioactive sources M and N, have half-lives of 4.0 hours and 6.2 hours, respectively. The…
A:
Q: After 1.82 days, the activity of a sample of an unknown type radioactive material has decreased to…
A:
Q: Mantles for gas lanterns contain thorium, because it forms an oxide that can survive being heated to…
A: Number of Thorium nuclei in 390mg of thorium is N = 60.2*1023/mol/232g/mol *(390*10-3g) =…
Q: A radioactive isotope has a half-life of 72.0 min . A sample is prepared that has an initial…
A: (a) Initial radioactive nuclei
Q: The radioactive nuclide Plutonium-199 has a half-life of 43.0 min. A sample is prepared that has an…
A:
Q: A moon rock collected by a U.S. Apollo mission is estimated to be 4.00 billion years old by…
A: Given Mass (m) = 1.375 g Half-life of U238 t12 = 4.47×109 years Present time…
Q: Many medical PET scans use the isotope 18F , which has a half-life of 1.8 h . A sample prepared at…
A:
Q: A radioactive sample has an initial activity of 6.55 x 10°Bq (1Bq is one disintegration per second).…
A: Given, initial activity N0 = 6.55 x 109 Bq After t=4 hours, activity N = 1.02 x 108 Bq Half life…
Q: If a radioactive substance has an initial activity of 0.67 Ci and a half-life of 3.0 days, what is…
A:
Q: The radioactive isotope 243 Am, with a half-life of 432 y, is the active element in many smoke…
A:
Q: A sample of a radioactive isotope with a decay constant of λ = 4.27 × 10-3 s-1. A sample of the…
A: we know activity R =λN where λ = decay constant N = number of particle given N = 2.68 × 1015…
Q: The radioactive isotope (95Nb) has a half-life of 35 days. A sample containing this isotope has an…
A: Half life , T12 = 35 days =35 x 24 = 840 hours Initial Activity , A0 = 4.5 x 108 Bq T1 = 36 hours…
Q: The radioactive isotope 234pa has a half-life of 6.70 h. A sample containing this isotope has an…
A:
Q: Radioactive radon-222, found in many homes, is a potential health hazard. The half-life of radon-222…
A:
Q: A certain isotope has a half-life of 6.4 h and an atomic mass of 87.29 u. What will the activity in…
A:
Q: Mantles for gas lanterns contain thorium, because it forms an oxide that can survive being heated to…
A: Given, The half-life, t1/2=1.405×1010 year The mass of the thorium, m=230×10-3 g The molecular mass,…
Q: radioactive sample initially undergoes 12.0×10^4 decays/s. Twenty-four hours later, its activity is…
A:
Q: Radium-226, 226Ra, undergoes an alpha decay. The current sample of Radium-226 has an initial…
A:
Q: A sample of radioisotope has a decay constant of 9.978x107 s1 and prepared with an initial activity…
A:
Q: How long does it take for the activity of a sample of sodium-22, which has a half-life of 2.6 y, to…
A:
Q: The half-life of the radioactive nucleus 226 88Ra is 1.6 ᵡ 103 yr. If a sample initially contains…
A: The expression for the decay constant(λ) is given as, λ = ln 2t1/2, where t1/2 is the half-life…
Q: purchased by a medical supply house. If the sample has a half-life of 14 d, how long will it keep…
A: Just replace the values .... An its done
Q: An isotope of iodine 1311, which has an eight-day half-life, is used in nuclear medicine. A sample…
A:
Q: Tritium has a half-life of 12.5 y against beta decay. Determine fraction of a sample which will…
A: (1) We have given Th=12.5 years Here Th= half life We know that NNo=12tTh NNo=122512.5=122=14 N=No/4…
Q: A particular radioactive sample undergoes 2.50××10^6 decays/s. a) What is the activity of the…
A: In the given question , We have to determine the values of given parts.
Q: A radioactive sample of 60Co (t₁/2 = 5.271 y) has a ß- activity of 4.4 X 107 Bq. How many grams of…
A: When the number of protons and neutrons inside a nucleus is not balanced some nuclei will become…
Q: Radioactive 214^83 Bi has a half-life of 19.9 min if the activity of the radionuclide 1.2 hours…
A:
Q: Determine the half-life (in s) of a radioactive sample that contains 1.10 x 105 atoms of the…
A:
Q: What is the half-life of an isotope that decays to 6.25% of its original activity in 60.2 h?
A:
Q: Determine the half-life (in s) of a radioactive sample that has a decay rate of 3.30 ✕ 1011 Bq when…
A: Given. N = 1.7*10¹⁵ dN/dt = 3.3*10¹¹ Formula used N(t) = N⁰*0.5t/T Where T is half life
Q: A piece of charcoal used for cooking is found at the remains of an ancient campsite. A 0.8 kg sample…
A: Approach to solving the question: Detailed explanation: Examples: Key references:
Q: A. B. Use the worked example above to help you solve this problem. The half-life of the radioactive…
A:
Q: A scientist is studying a 2.234 g sample of thorium-229 (t1/2 = 7340 yrs) in a laboratory. (a)…
A: The mass of the thorium is 2.234 g.The half-life time of the thorium is 7340 years.
Q: An element, X has an atomic number 41 and a atomic mass of 132.790 u. This element is unstable and…
A:
Q: The half-life of 43100Tc, a ß- emitter, is 15.8 s. a). How many atoms of 43100Tc are present in a…
A: Half life of decay = 15.8 Activity of sample = 0.2×10-6 = 3.7×1010 ×0.2×10-6 = 7400Bq
Q: unlabeled container of radioactive material has an activity of 78 decays/min. Four days later the…
A:
Q: What is the activity of a sample of C that contains 6.7x1020 nuclei? The half-life of C is 5700…
A: Solution:In 5700 years 6.5 × 10202 nuclei decay will take place, thus we have:5700 yrs =…
Q: A certain isotope has a half-life of 5.9 h and an atomic mass of 95.98 u. What will the activity in…
A:
Q: Many medical PET scans use the isotope 18F, which has a half-life of 1.8hr . A sample prepared at…
A:
Q: A radioisotope has a half-life of 5.0 days. The activity of a radioisotope sample prepared ten days…
A:
Step by step
Solved in 2 steps
