3. What is the half-life of a 100.0 g sample of nitrogen-16 that decays to 12.5 g of nitrogen-16 in 21.6 s?

Q: How long will it take a radioactive sample of iodine-131 (half-life 8.07  d ) to lose 99.2  %  of…

A: The given disintegration reaction is first order reaction. Half life t1/2 = 0.693 / K 8.07 days =…

Q: The half-life of nucleus Rn-222 is 3.88 days. How many mg of a 5000 mg sample of Rn-222 remains…

A: The half life of a given reaction refers to the time required by a given compound to reduce to half…

Q: Carbon-14 has a half life of 5730 years. How much carbon-14 would remain after 34380 years if the…

A:

Q: How much time is required for a 6.25-mg sample of 51Cr to decay to 0.75 mg if it has a half-life of…

A: The initial amount of the sample = 6.25 mg The amount of sample after time t = 0.75 mg. The…

Q: A rock contains 0.257 mg of Pb-206 for every milligram of U-238.The half-life for the decay of U-238…

A:

Q: The half-life of a decaying radioactive isotope is the time it takes for half of the original mass…

A: Here we are required to find the half life of the radio isotope

Q: Sodium-24, which is used to locate blood clots in the human circulatory system, has a half-life of…

A: Half life period: The time required to decay half of the initial amount is known as half life…

Q: What is the half-life (t1/2) of a radioisotope if 1000 grams of the sample decays to 125 grams in…

A: The nuclear half-life is amount of time it takes for half of sample to decay radioactively.…

Q: The half-life of radium-226 is 1.60 × 10' yr. How many hours will it take for a 2.50-g sample to…

A: The decay reactions are first order reactions. Hence for the first order reactions we can say that…

Q: The half life of an isotope is 43 seconds.how long does it take 100.00 g of isotope to decay to 6.25…

A: Given data contains, Half-life of an isotope is 43 seconds. Mass of isotope before decay is 100.0 g.…

Q: What is the half life of a radioactive sample , if 3/4 of its nuclei decay in 2 years ?

A: Given:The amount of nuclear decay in 2 years = ¾ th of initial massAssume that the initial mass =…

Q: After 52 hours of decay, only 0.06m of Cu-64 remains from the original sample of 1g. What is the…

A:

Q: The answer should be 26.7 days

A: Half-life:The time taken for half disintegration of radioactive element from its original amount is…

Q: The isotope Bismuth-212 has a half life of 368.65 day. What mass in mg of a 2 mg sample will remain…

A: Half life of Bismuth, t1/2 = 368.65 days. Bismuth-212 is a radioactive element. Thus, it will follow…

Q: 187 Cs has a half-life of 30.2 years. How many years will it take for a 100.0-g sample to decay to…

A: Half-life of Cs is 30.2 years. Intial amount sample = 100 g  Final amount sample = 1.00 g

Q: Cs-134 has a half-life of 2.0 years. How much of a 2.50-g sample of this isotope will remain after…

A: Given :- half life of Cs-134 = 2.0 years                Initial amount of sample = 2.50-g  To…

Q: a rock conatains 0.257mg of Pb-206 for every milligram of U-238. The half-life for the decay of…

A:

Q: 8. How long will it take for a sample of plutonium -239 with a half-life of 24000 years to decay to…

A: Given information : plutonium-239 Half life (t1/2) = 24,000 years Initial amount = Ao Final amount…

Q: After 119 days have elapsed, 1/12 of a radioisotope sample remains undecayed. What is the half-life…

A: Amount of radioisotopes remaining = 112 of the initial amount Number of days taken for the decay =…

Q: What is the half‑life of an isotope that decays to 6.25%6.25% of its original activity in 57.1 h?

A: The half-life of the isotopes can be described as the time at which the amount of the activity…

Q: Cesium-134 is a β emitter with a half-life of 2.0 years. How much of a 2.50-g sample of cesium-134…

A: The radioactivity decay follows the first order kinetics. The formula for the first order kinetics…

Q: A

A:

Q: The half-life of 87Sr is 2.80 h. Calculate how much time it would take for an isolated quantity of…

A: Time required to decay for a radioactive molecule,t = 2.303Klogaa-x Where a is the initial amount…

Q: Potassium-40 decays to argon-40 with a half-life of 1.27 * 109 yr. What is the age of a rock in…

A: It is given that potassium-40 decays to Argon-40 and has a half-life of 1.27×109 years and the mass…

Q: The half-life of 90Sr is 28.8 years. How long will it take (in years) for a 86.1 mg sample of 20Sr…

A: Given t= 28.8 years. t1/2 = ?

Q: If 18.9% of a sample of zinc-65 decays in 73.5 d, what is the half-life of this isotope (in days)?

A:

Q: If a rock sample was found to contain 4.65 x 10 mol of argon-40, how much potassium-40 would also…

A:

Q: 1.What is the half-life of 99Tc if a 500.0 g sample decays to 62.5 g in 639,000 years 2)How much of…

A: Given,Mass 500 g,Therefore, the first half-life is 250.0g.Second half-life is 125.0g.Third half-life…

Q: It takes 870.98 years for carbon-14 to decay to 90 mg. What is the half life of carbon-14?

A:

Q: The half-life of C-14 is 5730 years. How many grams of carbon-14 will remain after 17190 years, if…

A:

Q: Potassium-40 decays to argon-40 with a half-life of1.27x109 yr. What is the age of a rock in which…

A: Half-life: It is defined as the time required for a quantity to reduce half of its initial value.…

Q: One of the nuclides in spent nuclear fuel is U-235, an alpha emitter with a half-life of 703…

A: The relationship between the decay constant and the half-life period is given below.

Q: 137 Cs has a half-life of 30.2 years. How many years will it take for a 100.0-g sample to decay to…

A:

Q: What is the half-life of an isotope that decays to 3.125% of its original activity in 63.6 h?…

A: We know that,  N(t) = N0(1/2)t/t1/2 No = initial amount  N(t) = amount of substance at time t t1/2 =…

Q: PET scans require fluorine-18, wich is produced in a cyclotron and decays with a half-life of 1.83…

A: Given data,Half life(t1/2)=1.83hoursSpeed=60.0miles/hrLet initial concentration of F-18 be 100Final…

Q: The radioactive substance neptunium -139 decays to 72.85% of its original amount after 28 hours. How…

A: For radioactive decay, relation between rate constant and its concentration is give below.…

Q: 13' Cs has a half-life of 30.2 years. How many years will it take for a 100.0-g sample to decay to…

A:

Q: If a tree dies and the trunk remains undisturbed for 1.170 × 10' years, what percentage of the…

A: This is a first order reaction. t½ = 0.693 ÷ k 5730 = 0.693 ÷ k k = 1.21 × 10-4  year-1 where k is…

Q: The half-life of cobalt-60 is 5.3 years. How long will it take for a 1.000-mg sample of cobalt-60 to…

A: Given: The half-life of Co-60 is 5.3 years. The initial amount of Co-60 is 1.000 mg. The amount of…

Q: Radium-223 decays with a half-life of 11.4 days. How long will it take for a 0.240 mol sample of…

A:

Q: 3.) The Radioactive nuclide co has a half-Life of 8.5 hours, 55 27 what mass of Co Temains from a.…

A: Mass of sample remains after 18 hours is       0.0045 g.

Q: The half-life of Ga-67 is 77 9 hours. How long will it take Ga-67 to decay and lose 95% of its…

A:

Q: What is the half-live of a radioactive isotope if it takes 6.2 days for a 72g sample to decay to…

A: Given, 72 g to decay to 18 g. t = 6.2 days To calculate the half-life.

Q: 3. 137Cs has a half-life of 30.2 years. How many years will it take for a 100.0-g sample to decay to…

A:

Q: The radioactive nuclide Plutonium-199 has a half-life of 43.0 min. A sample is prepared that has an…

A: Half-life of radioactive substance: T1/2 = 43.0 min Initial activity of radioactive substance: AO =…

Q: 137Cs has a half-life of 30.2 years. How many years will it take for a 100.0-g sample to decay to…

A: Since you have posted multiple independent questions in the same request, we will solve the first…

Q: After 119 days have elapsed, 1/21 of a radioisotope sample remains undecayed. What is the half-life…

A: Suppose the initial amount of sample be Ao After 119 days, amount remaining, A = (1/21) Ao The…

Q: Zinc-62 decays with a half-life of 9.186 hours. 1. Write the balanced nuclear reaction of Zn-62 as…

A: As per the rules, only three sub-parts can be answered:

Writing and Balancing Nuclear Equations

A nuclear equation is a symbolic representation of a nuclear reaction using certain symbols. It is studied in nuclear chemistry and nuclear physics.