What percentage of reactant will remain after 120 seconds if the half-life is 60 seconds for a first- order reaction?
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Q: A sample containing I-131 has an activity of 6.40 × 108 Bq. How many days later will the sample have…
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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 .
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A: Half life means the time required to become the half of the initial concentration of the sample. The…
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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…
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A: Given: To explain the direction of the rate constant in which will be a larger as,
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…
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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.
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Q: Although nucleus is positively charged, how will you explain β-rays coming out of it?
A: β-rays can be both negatively charged as well as positively charged. Negatively charged β-rays are…
Q: PLEASE HELP ME ANSWER WITH SOLUTION find the following: Nuclear Radius Nuclear Mass Nuclear Volume…
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Q: If the delta variant death rate per day (Po) peaked at 2000 in late September and declined at the…
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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: Forced vibratory system, a body of mass 2 kg vibrates in a viscous liquid. The 20 N harmonic…
A: Given that: m=2 kgF=20 NA=15 mm=0.015 mT=0.15 s
Q: If given the following rate expression what is the overall order of the reaction? Rate = O Third…
A: To answer: The overall order of the reaction for the Rate reaction Rate=k[A][B]2
Q: What is the activity in Ci of a 2.6 mg sample of 3H? VE ΑΣΦ Ro = What is the activity in Bq of a 2.6…
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Q: The activity of 14C14C in a 70 -kg-kg human body is estimated to be 3.7 kBqkBq . What is this…
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Q: The half life iodine-131 is 10 days. What fraction will be left after 30 days if the original mass…
A: Given that, The half-life iodine-131 is 10 days, T1/2 = 10 days The formula for the half-life is…
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: 7.50 mCi of 99m Tc is used in a brain scan. What is the mass of technetium?
A: Here, the activity is The equation for the activity is
Q: How much energy 1g of fat contains? Calculate.
A: The energy is provided by the carbohydrates, proteins and fats. Three of these are measured in…
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…
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Q: For a chain reaction the following rate equation is obtained. Find the CB value.
A: The chain reaction initially starts with component A (at t=0) as more and more of it is converted…
Q: A cancerous tumour is exposed to an a-emitter with an RBE of 16. What absorbed dose, in Gy, is…
A: RBE of 16. 64 Sv
Q: The rate of a simple enzyme reaction is given by the standard Michaelis–Menten equation: rate = Vmax…
A: Given: Rate = Vmax SS+km
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: Write the equilibrium constant expression for each of the following reactions: a. HC(g) Ox(g) Cl(g)…
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Q: A driver has 0.115 BAC units in his blood. The legal limit is 0.08 BAC units. How many BAC units is…
A: Given, BAC in driver = 0.115 Legal BAC limit= 0.08
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…
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