What percentage of reactant will remain after 120 seconds if the half-life is 60 seconds for a first- order reaction?
Q: A first-order reaction has a rate constant of k = 0.00160 sec-1. How many seconds will elapse before…
A:
Q: A clinical technician finds that the activity of a sodium-24 sample is 136 cpm. What will be the…
A:
Q: A sample containing I-131 has an activity of 6.40 × 108 Bq. How many days later will the sample have…
A:
Q: Calculate the activity of a pure 9.5-μgμg sample of 32 over 15P (T1/2=1.23×106s).
A: Mass of sample (m) = 9.5 ×10-6 grams Molecular mass of P-32 = 32 grams Half life (T1/2) = 1.23×106…
Q: What is the half-life, t½, (in hr) when the concentration was 100 mg/L?
A: The concentration is decreasing at rate of 10mg/L/hr .
Q: The second-order decomposition of HI has a rate constant of 1.80×10-3 M-1·s-1. Calculate the…
A: Half life means the time required to become the half of the initial concentration of the sample. The…
Q: The deuteron binding energy may be best expressed as Group of answer choices mn + mp - md where the…
A: We need to calculate the binding energy of deuteron nucleus.
Q: hromium-51 is used in imaging red blood cells and has an effective half-life of 27 days. If a dose…
A: Given: The half-life time of the red blood cell is 27 days. The initial activity is 24 μCi. The…
Q: Why does a chain reaction not occur in uranium mines?
A: Naturally occurring uranium has 99.3 % of U-238 and 0.7% of U-235. Only the 0.7% of U-235 is…
Q: A thyroid cancer patient is given a dosage of 131I (half-life = 8.1 d). What fraction of the dosage…
A:
Q: Cs-137 has a half-life of 30.5 years. If the initial amount of sample is 10 g how much will be left…
A: For heavy nuclei, due to increased coulombic repulsion, the number of protons and neutrons may not…
Q: If the half-lifenof cesium-137 is 30 years, approximtely how much time is required to reduce a…
A: Half life of cesium, t1/2=30 years The mass of sample, Ao= 1 kg The reduced mass of sample, A=1 g…
Q: Why does %RAD value for the mass values and calculated volume have to be the exactly the same.
A:
Q: If the delta variant death rate per day (Po) peaked at 2000 in late September and declined at the…
A:
Q: atomic mass unit = 1.661x10-24 grams Technetium-99 has a half-life of 6 hours. Suppose a lab has 80…
A: Half life of Technetium -99 T1/2 = 6 hours Initial amount (mo) = 80 mg Let amount left after t…
Q: The activity of 14C14C in a 70 -kg-kg human body is estimated to be 3.7 kBqkBq . What is this…
A:
Q: If we had a radioactive waste giving off 5 MeV of gamma radiation, how thick would the following…
A: Given: Radiation needs to be reduced by 99%=0.99 To find: The thickness of substances for air,…
Q: Sr-90 is a byproduct of nuclear reactions inside nuclear reactor and a has a half-life of 29 years.…
A: Some configurations of protons and neutrons inside a nucleus are unstable. When an atomic nucleus is…
Q: Isotope X has a half-life of 100 days. A sample is known to have contained about 1,500,000 atoms of…
A:
Q: Technetium-99 m has a half life of 4.8 hours. If a patient receives a dose with an activity of 60.2…
A: Given data : Half life (t1/2) = 4.8 hours Dose received (N0) = 60.2 mCi…
Q: The isotope iodine -131 has a half-life of 8 days. If an individual is injected with 100 mg of…
A: Given that :the half-life of iodine-131, the initial amountthe elapsed time
Q: Find the absorbed dose if the electrons are completely absorbed in 106 g of tissue. Answer in units…
A: Given: The number of electrons emitted in a 15 day period is 1.168×1012. The total energy…
Trending now
This is a popular solution!
Step by step
Solved in 2 steps with 2 images
- A radioactive material decomposes half of its amount per minute. If after 2 mins, 100% undecayed amount decomposes into half, at what time it is still 100% undecayed?-1/3 betaR3 and +1/3 betaR3 are INCORRECT and NOT THE ANSWERS. Please answer correctly.9)A drug has a half-life of 6 hours. The drug is administered by I/V injection, and immediately after administration its plasma level is 136mcg/ml. Results for a blood test later on show a plasma level of 8.55mcg/ml. How many half-lives have passed?
- Cs-137 produces beta-minus particles. What types of interaction are likely to occur if a Cs-137 source is shielded in glass? In lead?Another series of nuclear reactions that can produce energy in the interior of stars is the cycle described below. This cycle is most efficient when the central temperature in a star is above 1.6x10' K. Because the temperature at the center of the Sun is only 1.5×10' K, the following cycle below produces less than 10% of the Sun's energy. (Enter the mass number in the first raised box, the atomic number in the second lower box, and the element in the third box.) (a) A high-energy proton is absorbed by 12c. Another nucleus, A, is produced in the reaction, along with a gamma ray. Identify nucleus A. (b) Nucleus A decays through positron emission to form nucleus B. Identify nucleus B. (c) Nucleus B absorbs a proton to produce nucleus C and a gamma ray. Identify nucleus C. (d) Nucleus C absorbs a proton to produce nucleus D and a gamma ray. Identify nucleus D. (e) Nucleus D decays through positron emission to produce nucleus E. Identify nucleus E. (f) Nucleus E absorbs a proton to produce…How much mass of a decaying 1kg sample with a half-life of 3hours will be left after 1 day has passed?
- From the following data for the first-order gas- phase isomerization of CH3 NC at 215 °C, calculate the first-order rate constant and half-life for the reaction: Time (s) Pressure CH3 NC (torr) 4 Part A Calculate the first-order rate constant. Express your answer using three significant figures. 0 510 2000 345 5000 192 8000 107 12000 49 15000 27.3 Part B k ΜΕ ΑΣΦ Submit Request Answer 0 ? Calculate the half-life. Express your answer using three significant figures. ΑΣΦΑ Ο ΑΣΦ 1/2 ? 8-1 Scan you convert GPE into KE? if yes how ?Technetium-99 (half-life = 6.0 h) is used in medical imaging. How many half live would go by 36 hours?