A radioactive substance has a ​half-life of 437 years. What is its decay​ rate?

Q: Cobalt-60, which undergoes beta decay, has a half-life of 5.26 yr.    If you start with 2.44 g of…

A: Interpretation: The amount of beta particles are emitted in 125 days is to be calculated from the…

Q: The half-life of the radioactive isotope astatine-218 is 2.00 seconds. How long will it take for the…

A: all radioactive reactions are first order.  Here first calculate the rate constant with the help of…

Q: The R & D department of the company is testing whether radioactive materials can be used as fuels in…

A: We know for radio active decay it follows first order rate equation. So we have to use the first…

Q: A certain drug has a half-life in the body of 3.5h. Suppose a patient takes one 250.mg pill at 6:00…

A: The half-life (T) in the units of min is calculated as follows:

Q: Use the References to access important values if needed for this question. Iron-59 is a radioisotope…

A:

Q: 30% of a radioactive substance has decayed after 10years, what is its half-life?

A:

Q: If a tree dies and the trunk remains undisturbed for 12,000 years, what percentage of original C-14…

A: Since you have asked multiple questions, we will solve the first question for you. If you want any…

Q: While harder to access, another radioactive isotope of technetium, Tc-93, has a half-life of 2.73…

A: Solution Tc ninety nine m is wide used for diagnostic and therapeutic functions. It emits gamma…

Q: The half-life of Uranium-238 is approximately 4.5(10°) years. How much of a 10 kilogram block of U-…

A: Given data :- Half life = 4.5 x 109 years mass of uranium = 10 kg

Q: Suppose the amount of a certain radioactive substance in a sample decays from 8.50 mg to 3.80 mg…

A: Given Initial concentration of radioactive substance =          8.50mg Final concentration of…

Q: A bone has a carbon-14 decay rate of 4.85 disintegrations per minute per gram of carbon. If a living…

A: Given : Decay rate of carbon-14 in bone = 4.85 disintegration per minute per gram of carbon Decay…

Q: What is the original mass of C-14 in a sample if 10.00 mg of it remains after 20,000 years? The…

A: The C-14 decays according to first order kinetics. Since we know that the relationship between the…

Q: The half-life of I-123 is 13 hours. If 10 mg of I-123 are administered to a patient, how much I-123…

A: All isotopic decomposition follows first order reaction. So the amount remaining after particular…

Q: What is meant by a chain reaction?

A: Answer Nuclear fission reaction proceed by chain reaction

Q: Assume that the rate of decay of a radioactive substance is proportional to the amount of the…

A: Nuclear reactions are a type of chemical processes that lead to the formation of some new nuclei…

Q: Use the table on the right to answer the following questions. 11. How long is a half-life for…

A: Note : As per our guidelines , we are supposed to answer only subparts of first question (11 to 14)…

Q: The half life of a certain substance is 5.6 days. How long will it take for 100 g of the substance…

A: Radioactive decay follows the first-order kinetics. The decay constant (λ) and half-life of a…

Q: Many scientists believe that large asteroid struck the earth that kill off dinosaurs. Fragment of…

A:

Q: If you start with a 13.16 g sample of Pt197which has a half-life of 19.89 hours, what is the mass of…

A:

Q: Assume that the rate of decay of a radioactive substance is proportional to the amount of the…

A: (a) Half-life (t1/2) = 0.693 / k or, k = 0.693 / t1/2 where, k = rate constant

Q: If 10% of a radioactive substance decomposes in 200 years, what percentage will be present at the…

A: Given is the amount decomposed after 200 years and we have to find after 1000 and 2000 years.

Q: Given the rate constant, k, for the decay of a radioactive substance, how would you find the…

A: Given :- rate constant for decay of radioactive substance = k  To find :- half-life (t1/2)

Q: Cobalt-60 is a strong gamma emitter that has a half-life of 5.26 yr. The cobalt-60 in a radiotherapy…

A: All radioactive decays are first order reactions. The integrated rate law for 1st order reaction is…

Q: The isotope strontium-90 is produced during testing of nuclear weapons.  If 100.0 mg of strontium-90…

A: Given  Initial Amount of Sr - 90  (A)o = 100 mg  Half life time ( t1/2 )  =  29 years  Time ( t ) =…

Q: Carbon Dating: Carbon-14 commonly used for dating historical artifacts, is a radioactive isotope…

A: Given: Amount of carbon-14 in the bone remaining, [A] = 47% of its original concentration = 0.47…

Q: a new compound called corpium radioactively decays at the rate of -0.035% every year, if there is…

A:

Q: What is C-14 activity in a sample that is 2.0 x 104 yr old? Assume that C-14 activity in the living…

A:

Q: A normal adult jawbone contains 200 mg of Carbon-14 in a living person. If scientists found a…

A:

Q: A normal adult jawbone contains 200 mg of Carbon-14 in a living person.  If scientists found a…

A:

Q: Imagine you collected a volcanic rock while on vacation to Hawaii and you want to know how old it…

A: GIVEN: Amount of parent nuclei (U-234) = 4 micrograms Amount of daughter nuclei (Th- 230) = 124…

Q: A normal adult jaw bone contains 200mg of carbon -14 in a living person. If scientists found a…

A: Decay of C-14 follow 1st order kinetics λ (decay constant) = 0.693/t1/2 = 0.693 / 5730 years = 1.21…

Q: Cobalt-60 is a strong gamma emitter that has a half-life of 5.26 yr. The cobalt-60 in a radiotherapy…

A: There are some unstable nuclei which undergo radioactive decay by emission oc charged particles.…

Q: a radioactive isotope. Z-109 has a half life off 43.1 years. how manny years Will it take the sample…

A:

Q: Copper(II) acetate containing copper-64 is commonly used to study brain tumors. This isotope has a…

A: The half-life of an isotope is defined as the time required for a quantity to reduce into half. It…

Q: Iron-59 is used to study iron metabolism in the spleen. Its half-life is 44 days. How many days…

A:

Q: A radioactive isotope emits 999 disintegrations per minute due to beta decay. If after 1.01 years…

A: Since the relationship between activity and time is given by  A0 e-λt = A where A = activity after t…

Q: The concentration of carbon-14 in living plants is about 240 Bq/kg C. If a tree dies today, what…

A:

Q: The radioactive isotope Pu-238, used in pacemakers, has a half-life of 87.7 years. If 1.6 milligrams…

A:

Q: A certain radioactive substance has a half life of 50 hours that is half of the original quality has…

A:

Q: How much time is required for 84% of the isotope to decay?

A: Given: Iodine-131, which is used to treat thyroid cancer, has a half-life of 8.04 days. The…

Q: A volcanic eruption melts a large chunk of rock, and all gases are expelled. After cooling, argon-…

A: (half-life of potassium-40 is 1.25 x 10° yr) is wrong it should be 109 (half-life of potassium-40 is…

Q: avier is at NASA analyzing Moon rocks. In one of the rocks from the lunar maria, he discovered 79 %…

A:

Q: Supposed that a radioactive substance has decayed until only of 1/8 of it remains. For how many…

A: All radioactive substance follows first order kinetics.

Q: Q9. What is daily rate of decay for a radioactive medicine, used for cancer treatments, if its…

A: Radioctive  decays are the first order reaction  so formula for 1st  order reaction will be used

Q: The radioactive decay of thallium−206 to lead−206 has a half-life of 4.20 min. Starting with 5.60…

A: All radioactive decay follows first order kinetics. So we can use the equation of first order…

Q: A sample of bone is subjected to radiocarbon dating. The current decay rate observed for its…

A:

Q: A bone has a carbon-14 decay rate of 4.98 disintegrations per minute per gram of carbon. If a living…

A: Solution : N0= 4.98 dpm N(t) = 15.3 dpm  t1/2 = 5715 years  t = ?

Q: Cobalt-58 which is radioactive, has a half-life of 71 days. How

A: Radioactivity follows first order kinetics Hence decay constant (K) and t1/2 (half life ) related as…

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.