find the activity of a certain material after 4.9weeks if it has a half life of approzimatately 259hrs. the activity of the material at the time it was used was 4uCi
Q: What is the activity of a 20 ng sample of 92Kr, which has a half-life of 1.84 s?
A: In 92gm of 92Kr, will contain 6.02×1023 atoms of 92Kr.
Q: World War II aircraft had instruments with glowing radium-painted dials (see Figure 31.2). The…
A: Given data: The activity of the instrument is Ro=1.0×105 Bq. The time is t=57.0 yr. The half-life…
Q: If the parent nucleus in a ß* decay is CI, what is the daughter nucleus? 17 Help chemPad XX Greek:…
A:
Q: A 5,560 Ci 60 Co source used for cancer therapy is considered too weak to be useful when its…
A: Given, The activity of C60o used for cancer therapy = 5,560 Ci = R0 The reduced activity of C60o…
Q: Calculate the mih required to remove an alpha Particle 238 From the Uranium ISoto Pe 92
A:
Q: What is the alpha activity of a 10-kg sample of 235U that is used in a nuclear reactor?
A: Given: Mass of the sample m = 10 kg.
Q: A radioactive sample with a half life of 4.8 weeks has 3.05e+15 nuclides present in the initial…
A:
Q: Tritium has a half-life of 12.3 years. Suppose there are initially 1.0 x 1012 tritium atoms. (a)…
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Q: B- Measurements on a radioactive sample show that its activity decreases by a factor of five during…
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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: 6. If 120 mCi of radicactive Geld-198 with half-ife 27 days is administered radiation therapy, what…
A: Given, Mass,m=120gMolar Mass,M=198gHalf time,t12=2.7days=233280sTime,t=3 weeks=1.814×106sAvogadro…
Q: A patient swallows a radiopharmaceutical tagged with phosphorus-32 (P), a B¯ emit- ter with a…
A: Concept: To determine the Number of Electrons emitted in 15 days we have to calculate the No. of…
Q: A sealed box was found which stated to have contained an alloy composed of equal parts by weight of…
A:
Q: The maximum kinetic energy of the beta particle emitted during the decay of {60}^_{27}Co.
A: When beta particle is emitted during the decay of C2760o it is convert in to N2860i…
Q: A patient swallows a radiopharmaceutical tagged with phosphorus-32 32 15 P, a ß- emitter with a…
A: (a) To find the number of electrons emitted in a 9.5 day period, we need to calculate the decay…
Q: ma nuclear accident absorbe 1 370,000 Bq. Assume thata p in the skeleton. The skelet person's body…
A: A dose equivalent is given as, Sv=dose in Gy×RBEHere, RBE=1Dose in Gy=energy absorbedmass of…
Q: 198Au has a decay constant of 2.97 x 10-6 s-1. Activity of 1 g of the sample will be 9.03×1015 Bq.…
A: Unstable nuclei become stable by radiating energy. This process is called radioactivity. The rate at…
Q: When fewer than 3.75 × 106 americium nuclei remain, the ionization smoke detector will not operate…
A: Given that:The half-life of Americium-241The threshold below which the ionization smoke detector…
Q: A cancer patient is undergoing radiation therapy in which protons with an energy of 1.2 MeV are…
A:
Q: Find the activity of a sample containing 4.72 x 10-6 g of 60/27Co (T1/2 = 5.27 years)
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Q: A 5000-Ci ⁶⁰Co source used for cancer therapy is considered too weak to be useful when its activity…
A: Basic Details The ratio of the activity is an exponential function of decay activity and the time…
Q: Two radioactive elements A & B have initially activity 10 curie & 20 curie respectively. If A has…
A: Two radioactive elements A & B have initially activity 10 curie & 20 curie respectively. If…
Q: OI 84 PO (polonium y to provide a source of a-particles of 5 millicuri if half life of polonium is…
A: Half-life is the time required for a quantity to reduce to half of its initial value. Here, we…
Q: A piece of radium has an activity of 92 mCi. (a) What is the mass of the radium?
A: Given: The activity of the radium is 92 mCi. The molecular mass of the radium is 226.
Q: What time interval elapses while 51.0% of the radioactivity of a sample of 7233As disappears, as…
A: As per given data, 51% of the radioactivity of a sample disappears.
Q: Unreasonable ResultsThe relatively scarce naturally occurring calcium isotope 48Ca has a half-life…
A: One half-life is said to have been passed when the radioactive isotope decays to 50% of its initial…
Q: mine the amount of 84Po 210 (polonium) o provide a source of a-particles of 5 millicurie half life…
A: Here, we calculate the amount of 84po210 as given follow;
Q: Find the activity of a certain material after 3.4 weeks if it has a half life of approximately 326…
A:
Q: A. B. Use the worked example above to help you solve this problem. The half-life of the radioactive…
A:
Q: 4. The following reaction occurs on the su He+ He→Be Hew much emengy is eleased
A: Given: The atomic mass of the hydrogen is m(H11 ) = 1.00784 amu The atomic mass of the neutron is m…
Q: The activity of a 5mg radioactive sample whose atomic mass is 220u and half life is 3.5 days:
A:
Q: Radon decays through a chain of four very short-lived radionuclides (half- lives of 20 minutes and…
A: Let us analyse the question in step 2.
Q: 74 74 33As disintegrates to 32Ge in 68% of the cases, and to 34Se otherwise. T₁ for the 2 parent…
A: Radioactive decay: The spontaneous process in which the unstable radioactive nuclei disintegrate…
Q: A patient suffering from thyroid disorder is given a certain amount of iodine 131 53I It has a…
A:
Q: equilibrium with all its progeny. Assuming rlI2is 1602y (d) How many atoms of Ra does it contain,…
A: (d) The atoms of Ra does it contain The half life is 1602 y. λ=0.6931602×365×24×3600λ=1.371×10-11…
Q: Many radioisotopes have important industrial, medical, and research applications. One of these is…
A: Decay constant
Q: The bones of a prehistoric bison were found to have a 146C activity of 2.80 dis/min carbon.…
A: At present C614 decay rate is 13.6 dis/ min gram
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: A 5000-Ci60Co source used for cancer therapy is considered too weak to be useful when its activity…
A: The ratio of the activity is an exponential function of decay activity and the time period. The time…
Q: A radioactive sample has a decay constant of 49.15x10-12 s¹. Estimate the half-life.
A: Radioactive decay is the process by which unstable nuclei spontaneously lose energy to become…
Q: A technician was accidentally exposed to potassium-42 while doing some brain scans for possible…
A: Activity after 36 hours = 2 micro Ci half life = 12 hr time = 36 hr
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