Consider the radioisotope 235U (half life = 7.04 × 108 years). What is the first order rate %3D constant for 235U?

Q: How many days does it take for 0.600 mgmg of lead-103 (half-life 17.0 dd) to decay to 7.50×10−2…

A: The objective of this question is to find out the time it takes for a certain amount of a…

Q: How long will it take for 1.800 mg of promethium-144 to decay to 0.1125 mg? The half-life is 17.5…

A: we have to calculate the time taken for 1.800 g promethium to decay to 0.1125 g

Q: Gallium-67 is used medically in tumor-seeking agents. What is the half-life of gallium-67 if 229…

A: Time = 229 hours  Reduced activity = 13.2 %  Half life time of gallium - 67 = ?

Q: Americium-241 is widely used in smoke detectors. Calculate the amount of americium-241 consumed in a…

A:

Q: A sample of radioactive technetium-99 of half-life 6 hh is to be used in a clinical examination. The…

A: Given: Half-life of isotope = 6 hours. And the time passed = 15 hours.

Q: Radium-226 has a half-life of 1600 years. If a sample of radium-226 has a mass of 512 milligrams,…

A: we have to calculate mass of radium-226 remaining after 8000 years  Sign of the values R and S

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

A:

Q: ^35 S (abundance 0.02%) is the longest living of the sulfur radioactive isotopes. It is formed from…

A: Answer - Nuclear reaction -  a nuclear reaction is semantically considered to be the process in…

Q: What was the original mass of a sample if 0.0750 grams remain after 11.47 days?

A: Given, The half life of Rn-222 is 3.823days.   0.0750 grams remain after 11.47 days  The original…

Q: Cesium – 137 has a half life of 30 years. How much of a 100 mg sample is left after 120 years?

A: A numerical problem based on half-life period, which is to be accomplished.

Q: If a tree dies and the trunk remains undisturbed for 1.210 × 10⁴ years, what percentage of the…

A: given data is  half-life is 5730 years remains undisturbed for 1.210 x 104 years

Q: If a tree dies and the trunk remains undisturbed for 1.770 × 10⁴ years, what percentage of the…

A: The objective of this question is to find out the percentage of the original 14C (Carbon-14) that is…

Q: [Refere A 1.14 g sample of a radioactive isotope decays to 0.87 g in 36.3 hr. What is the half-life…

A: Given  Initial Amount [ A ]0   = 1.15 gram  Remaining Amount [ A ]    = 0.87 gram  Time ( t ) = 36.3…

Q: If a tree dies and the trunk remains undisturbed for 1.160 × 10⁴ years, what percentage of the…

A:

Q: The half-life time of an isotope of element X is 7.4 hours. Assuming that you start with 431 mg of…

A:

Q: The half-life of 42K is 12.5 h. How much will remain after 101 h if the original sample contained…

A: Given: The half-life of 42K = 12.5 h. Initial amount of sample =256 g Time =101 h To determine:…

Q: The half-life of nobelium-259 is 58 minutes. Suppose we have an 80 mg sample. Find a formula for the…

A: The radioactive decays follow first-order kinetics.

Q: Americium-241 is widely used in smoke detectors. Calculate the amount of americium-241 consumed in a…

A: The objective of the question is to calculate the amount of Americium-241 consumed in a smoke…

Q: half-life of carbon-14, 14C, is approximately 5,730 years. A bone fragment is estimated to have…

A: The half-life of carbon-14, 14C, is approximately 5,730 years. A bone fragment is estimated to have…

Q: Radioisotope X has a half-life of 4.0 h. Based on the figure below, if the original sample of the…

A: Half life (t1/2) :-  The time required for the concentration of reactant to reduce to half of its…

Q: We have an initial amount of H3N2C14 of 72 milligrams, and a half-life of 30 days. Find the decay…

A:

Q: The half-life of Cs-131 is 30.2 years. How much time would it take for a sample to drop to 1.00% of…

A: * cs=3Half life=t12=30.2 yearsfrom this half life we can calculate , rate constant for this…

Q: The half-life of 14C is 5730 years. A sample contains 92.4% of the 14C it would contain if it were…

A: The age of the old fossils can be find out by using carbon dating method.  So the amount of 14C…

Q: The isotope 166-Yb decays by electron capture with a half-life of 57 hrs. What percentage of the…

A: We have to calculate the percentage of isotope left

Q: If a tree dies and the trunk remains undisturbed for 1.375 × 10⁴ years, what percentage of the…

A: Radioactive decay follows first-order kinetics. The half-life of the first-order reaction does not…

Q: Iodine-131 is used in the treatment of thyroid disease. What is the half-life of iodine-131 if a…

A: Weight of sample initially = 160mg Weight of sample finally = 5mg Time elapsed = 40 days We have to…

Q: Iodine-131 is used in the diagnosis and treatment of thyroid disease and has a half-life of 8.0…

A:

Q: How many days does it take for 0.600 mgmg of lead-103 (half-life 17.0 dd) to decay to 7.50×10−2…

A: The objective of this question is to find out the time it takes for a certain amount of a…

Q: The isotope 22288Rn has a half-life of 3.8 days. How long does it take for 0.050 mmol to decay to…

A:

Q: Americium-241 is widely used in smoke detectors. Calculate the amount of americium-241 consumed in a…

A:

Q: what fraction of a radioisotope has decayed after two half-lives?

A: The time required for a quantity of a radioisotope to decay by half is known as the half-life time.…

Q: (5) The half life of sodium-24, which diminishes by first order radioactive decay, is 15.0 hours. A…

A: Given, the half-life is for sodium-24 Time for first order decay = 15.0 hours Now, calculate the…

Q: I 3. All radioactive decay processes follow first-order kine - ics. What does this mean? What…

A: The statement that all radioactive decay processes follow first-order kinetics means that the rate…

Q: If a tree dies and the trunk remains undisturbed for 1.305 × 104 years, what percentage of the…

A:

Q: If a tree dies and the trunk remains undisturbed for 1.775 × 10⁴ years, what percentage of the…

A: Given-> Half life = 5730 year  Time = 1.775 × 104 year.

Q: Radon has been the focus of much attention recently because it is often found in homes. Radon-222…

A:

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 means time takwen by the sample to reachhalf of its concentartion.  Remains afetr t time =…

Q: Gallium-67 is used medically in tumor-seeking agents. What is the half-life of gallium-67 if 219…

A:

Q: original

A: t1/2 =  8.02 days t = ? for 99% decay

Q: If a tree dies and the trunk remains undisturbed for 1.690 × 10⁴ years, what percentage of the…

A: If a tree dies and the trunk remains undisturbed for 1.690 × 10⁴ years, what percentage of the…

Q: An unidentified corpse was discovered on April 21 at 7:00 a.m. The pathologist discovered that there…

A: The objective of this question is to determine the initial amount of 32P present in the victim's…

Q: What is the half-life (in years) for a radioactive isotope with a rate constant of 6 yr1? Do not…

A:

Q: Gold-198 is used in the diagnosis of liver problems. The half-life of 198Au is 2.69 days. If you…

A: Given,  Half-life of Au = t1/2 = 2.69 days  Initial concentration = N0 = 2.8 mg  Time period = t =…

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.