An old wooden tool is found to contain only 6.0% of C that a sample of fresh wood would. How old is the tool?
Q: A first-order reaction has a rate constant of k = 0.00160 sec-1. How many seconds will elapse before…
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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…
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Q: 10.10. A sample of wood from an Egyptian mummy case has a specific activity of 9.41 d/min-g. How old…
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Q: (a) Determine the product of the reaction Li + *He → ? + n. → Help chemPad |Xu|X| Greek (b) What is…
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Q: Problem A You have a 3 mol pure sample of an unknown material. After 3.7 h, you discover that 20%…
A: We can use the equation for radioactive decay: N(t) = N0 e^(-λt) where,N(t) is the amount of…
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Q: A sample of 134La(T/2 = 6.5 min) has an activity of 4 curies. What was its activity one hour ago?
A: Final Activity A = 4 curies Half life T1/2 = 6.5 min time t = 1 hour = 60 min
Q: Mantles for gas lanterns are made of thorium, because it forms an oxide that can survive being made…
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Q: Enter your result in MeV to 2 decimal places
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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…
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Q: The relationship between the half-life time and the rate constant of a zero order reaction is given…
A: Here, we need to derive the relationship between the half life time and the rate constant of a zero…
Q: A piece of wood found at an archeological site was found to have an activity of 14C activity 28% of…
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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: 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: A lab worker reports an activity of 80,000 counts/scounts/s for a sample of magnesium-21, whose…
A: The objective of the question is to understand the reason behind the drastic decrease in the…
Q: A sealed box containing alloys of metal A and Metal B consisting of the same parts accordingly.…
A: half life of A = 12 years half life of B = 18 years mass of A = 0.53 kg mass of B = 2.20 kg A =…
Q: A sealed box containing alloys of metal A and Metal B consisting of the same parts accordingly.…
A: We need to find the age of the alloy based on the given information.
Q: A 7. A saline solution of 24Na with an activity of 300 kBq is injected into the bloodstream of one…
A: The objective of the question is to calculate the patient's blood volume using the given activity of…
Q: You have a 2.8 mol pure sample of an unknown material. After 4.7 h, you discover that 89% has…
A: Given problem is based on the law of radioactive decay.
Q: The mass defect for potassium-40 is: -___x10-28kg. (Give your answer with 3 sig digs and do not…
A: The objective of this question is to calculate the mass defect of potassium-40. The mass defect is…
Q: A piece of charcoal used for cooking is found at the remains of an ancient campsite. A 0.92-kg…
A: The initial activity of the sample can be obtained as R0=0.92×103 g15.0 decays/min11g=1.38×104/min
Q: (a) A wooden artifact is found in an ancient tomb. Its carbon-14 ( 14 c) activity is measured to be…
A: Known quantities:- Half life of carbon-14 (T1/2)= 5730 years Age of artifact is given by formula…
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- Please help me answer the following.What is the activity of a sample of C that contains 6.7x1020 nuclei? The half-life of C is 5700 years. Express your answer using two significant figures. Tea. Compute the binding energy of the reactants and of the products in the nuclear fusion reaction 2H + 6LiS 4He + 4Heb. What is the change in binding energy per nucleon in this reaction?
- You find a 37.2 g fossilized bone that has an activity of 0.024 counts per second. How old is the bone? Please give your answer in years.What mass of fluorine -18. (F-18) is an activity of 10mCi? How long will it take for the activity to decrease to 0.15mCi?90 6. Because of its chemical similarity to calcium, Sr can collect in the bones and present a health risk. What percentage 90 90 of Sr present initially still exists after 47.5 y?(The half life of Sr is 28.8 years) 38 % 60 so £60 3 ssf60 sk f60 ssf
- After production, a 300µl solution with a specific activity of 50 GBq/ml was torn. Delivery timeis 1 day. The half-life of the isotope is 4 days. Find the amount of solution that needs to besent so that the customer has 3.0 GBq at the date of delivery.14 A sample has a ¹4C activity of 0.0027 Bq per gram of carbon. (a) Find the age of the sample, assuming that the activity per gram of carbon in a living organism has been constant at a value of 0.23 Bq. (b) Evidence suggests that the value of 0.23 Bq might have been as much as 27% larger. Repeat part (a), taking into account this 27% increase. (a) Number i (b) Number i Units Units