Copper-64 is used in the form of copper acetate to study brain tumours. It has a half-life of 12.8 hours. If you begin with 15.0 mg of 64 Cu-labelled copper acetate, what mass in mg remains after 2 days and 16 hours?

Q: A sample of wood from an Egyptian mummy case has a specific activity of 9.41 d/min-g. How old is the…

A: Given A sample of wood from an Egyptian mummy case has a specific activity of 9.41 d/min-g

Q: The number of viruses (V , measured in trillions or 10¹²) that infect a person is a function of the…

A: Fever as a function of immunosuppression F(I) =37+2*I^2 If immunosuppression is complete then fever…

Q: A student collected 38.62 mL of H2 over water at 25.00 ºC. The water level inside the collection…

A: The reaction of Zn with the HCl is produced ZnCl2 and H2 Zn + HCl ------------> ZnCl2 + H2 from 1…

Q: A well-sedimented sample of protein in water is found to have a concentration of protein of 1600…

A: Here given that at the bottom of the vial contains protein of 1600 particles per μL and 5 mm above…

Q: A sample containing I-131 has an activity of 6.40 × 108 Bq. How many days later will the sample have…

A:

Q: Which of these statements about fission and fusion are correct? Select one or more: a. Fission…

A: Nuclear fission is the reaction in which heavy nuclei splits into small nuclei with a large amount…

Q: A nuclear fission reactor uses nuclear reactions, of which the following is typical: *? +6? → ? + Te…

A:

Q: KO2 is used in a closed-system breathing apparatus. It removes carbon dioxide and water from exhale…

A: Given information: Mass of O2 = 235 g Mass of KO2 = 123 g

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: Phosphorus-32, half life of 14.268 days estimating from 14days how many days will it take for…

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Q: A sample of silver contains 5.00 micrograms of Ag-105.  Determine the activity of the sample in…

A:

Q: The half-life of americium-241 is 457 years. What is the activity in curies of a 0.010g of sample of…

A: Half life of americium 241  t1/2 = 457 years Mass of sample m = 0.010 g Molar mass of americium -241…

Q: The size of a bacteria is 0.25 micrometer. This size is same as О а. 250 nm O b. 25 nm O c. 2.5 nm O…

A: 1 micrometer = 10-6 m 1 nm = 10-9 m

Q: A sample of protactinium-234 of mass 100 g has a half-life of 6.7 hours. A. What fraction of the…

A: Given. Initial mass of protantium 234 is 100 gm. Half life is 6.7 hr. Formula. N(t) = No (1/2)t/T

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: 14. What is the percentage of a 200g sample of Nitrogen-16 that decays to 12.5g in 21.6 s? C. 25% D.…

A:

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: 1. Calculate the energy change in magnitude of the change in energy (in J/mol of reactant) for this…

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Q: (a) Natural potassium contains 40K , which has a halflife of 1.277×109 y. What mass of 40K in a…

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Q: A sample of carbon tetrachloride rose to a height of 4.76 cm at 20°C in a capillary tube having an…

A: The sample rises to height h=4.76 cm=0.0476 m in a capillary tube of radius r=0.01 cm=0.0001 m…

Q: How many neutrons are in uranium-235?

A: The number of protons equals the atomic number. The number of protons and neutrons together…

Q: These questions are sample activity in our physics lab, and I still don't get it. can you please…

A: There are some rules for significant numbers 1) The zero preceding the non zero value will not be…

Q: The half-life of l-137 is 8.07 days. If 25 grams are left after 40.35 days, how many grams were in…

A: The formula of the radioactivity is  where, N is the amount left, No is the initial amount, t is…

Q: A Geiger counter is placed at a distance 2m from a Cobalt 60 source emitting γ rays. The measured…

A:

Q: a) What controls the chain reaction in a nuclear reactor? b) A close look at the diagram below shows…

A: Nuclear reactors are the devices which generate heat/Energy through a physical process called…

Q: The atomic mass of an oxygen atom is 15.999 u. Convert this mass to units of (a) kilograms and (b)…

A: (a)

Q: number of alpha-decays of Q in the first one hour is;

A: Given: Determine number of alpha decays of Q in the first one hour ?Where,   A heavy nucleous Q of…

Q: A patient with thyroid cancer is given a sample of lodine-131 which has a half-life of 8 days. If…

A:

Q: (e) The ratio of the concentrations of carbon-14 to carbon-12 in a bone of a prehistoric person is…

A:

Q: The decay rate of an isotope is initially R0 but after one half-life has gone by, the rate is R0/2.…

A: *According to question:-Decay Rate of Isotope initially=Ro& Decay Rate after one-half…

Q: If a patient ingests a small quantity of l'31 for treatment of hyperthyroidism. The lifetime of 131…

A: The given data are: t12=8.1 dayst=16.2 days Here, t12 denotes the half-life and t denotes the time.

Q: Manufacturers of headache remedies routinely claim that their own brands are more potent pain…

A:

Q: A Geiger counter is placed at a distance 2m from a Cobalt 60 source emitting γ rays. The measured…

A:

Q: A city has the following description W=6 kM , L=15 kM , u=2,5 m/s , H=900 m. The upwind , or…

A: Given:                  W=6km                  H = 900m                  L=15KM                  b=…

Q: Substance X has a half-life of 10 years, if you start with 1000 grams, how much will be left after…

A: Given data:  Half life (t1/2)= 10 years Initial quantity (N0) = 1000 grams  Time (t)  = 100 years…

Q: (a)How long would you have to work at an activity of 15 kal/min to lose 4.45 kg of proteins? (b)If…

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Q: 13. Assume that concentrations of Pb in rainwater collected in Minneapolis was found to be 9.5 µg/L.…

A:

Q: A GM counter has dead time of 250 s. It records 20.000 counts per minute. What is the actual count…

A: SOlution: Given that dead time T = 250 micro s = 250x10-6 s measured counting rate n = 20.000 counts…

Q: Natural potassium contains ⁴⁰K , which has a half-life of 1.277×10⁹ years. What mass of ⁴⁰K in a…

A:

Q: A sample of 1.0 × 1010 atoms that decay by alpha emission has a half-life of 100 min. How many alpha…

A: According to the law of radioactive disintegration, Nt=N012tt12 Find the number of emitted alpha…

Q: What mass of fluorine -18. (F-18) is an activity of 10mCi? How long will it take for the activity to…

A: The half-life of F-18 is 109.7 m. The formula for the decay constant is:

Q: Consider the nuclear reaction: a + XY+ b. If the sum of the masses of the reactants is greater than…

A: it is exothermic reaction. mass got converted into energy.

Q: (a) Find the radius of an iron-56 nucleus. (b) Find its approximate density in kg/m3 , approximating…

A: Given data: Mass number of iron, A=56 Mass of Fe56, m=56 u Known data: Constant, r0=1.2…

Nuclear Reactions

Nuclear reactions are processes in which the fundamental characteristics of a nucleus changes. They change into a completely different nucleus. These processes occur naturally in an unstable nucleus. Bombarding an energetic particle can induce nuclear reactions.  In this article, both the naturally occurring nuclear reactions are termed as radioactive decay and the induced nuclear reactions are further categorized as nuclear fission and nuclear fusion.