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

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: 150-water is a radioactive variation of regular water, in which some usual oxygen atoms are replaced…

A:

Q: Iron-59 is a radioisotope that is used to evaluate bone marrow function. What is the half-life of…

A: Given,final activity of iron-59 = 17.2 %The time taken to decrease activity of iron-59 from original…

Q: The first-order decay of radon has a half-life of 3.823 days.  How many grams of radon remain after…

A: Ans

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: Tellurium-123 is a radioactive isotope occurring in natural tellurium. The decay constant is 1.7 x…

A: Radioactivity is a special property of some elements or substances by which they continuously…

Q: The half-life of 223Ra is 11.4 days. How much of a 200.0 mg sample remains after 600 hours?

A:

Q: radidactive research, particulary in studies mass (in mg) oudsoud g of Na, 32PO, after 40.0 days?…

A: Radioactive decay follow first order kinectics. Half life = 14.3 days

Q: The half-life of Pxygen-15 is 2 minutes. What fraction of the sample will remain after 10 minutes…

A:

Q: The first-order decay of radon has a half-life of 91.75 hours. How many grams of radon remain after…

A:

Q: Yttrium-90 is a radioactive isotope used to treat tumors in the liver. 90 Y has a half-life of 2.67…

A: Given : Half life of 90Y = 2.67 days. And mass of 90Y remaining after 1.03 days = 4.02 µg

Q: ives? A sample of Oxygen-19 has decayed down to 1/32 of its initial concentration a What is the…

A: We have to find half life

Q: Another form of radiometric dating is potassium-argon dating, which tracks the ratio of Ar-40 to…

A: Any reaction following "first-order reaction", that reactions rate always relies over single…

Q: A to 240mg sample of technetium 99M is used for a diagnostic test. if Technetium -99m has a…

A:

Q: The half-life of plutonium-239 is 24,110 years. If an original sample is 100. grams, how much…

A:

Q: The natural abundance of 14C in the earth's atmosphere and all living organisms is approximately…

A: Half-life is the time taken for the reactant to reduce the amount of the isotope to half its initial…

Q: Chromium-51 is a radioisotope that is used to assess the lifetime of red blood cells The half-life…

A: Given: The half life, (t1/2)=27.7 days. The initial concentration of Cr-51=28.7 mg 981

Q: The half-life of protactinium-234 is 6.69 hours. What fraction of a given amount remains after 26.76…

A:

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: lodine-131 is a radionuclide that is frequently used in nuclear medicine. Among other things, it is…

A: Chemical kinetics is the study of the reaction that how fast or slow a reaction is taking place. The…

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: The half-life of cobalt-60 is 5.20 yr. How many milligrams of a 2.000-mg sample remains after 9.50…

A: First of all let's see the given data in the question, Half-life of cobalt-60 ( t1/2 ) = 5.20 years…

Q: Approximate half-life 4 days 8 days 1600 years 5730 years 24,120 years 4,470,000,000 Radioactive…

A:

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: If a tree dies and the trunk remains undisturbed for 1.195 × 10⁴ years, what percentage of the…

A: Carbon dating is a technique to estimate the age of the tree or rock

Q: A product of nuclear exposion is plutonium-239, which has a half life of 24000 years. What % remains…

A: Plutonium-239 is a radioactive element. It spontaneously disintegrates into new elements. The…

Q: The isotope 226Ra has a half-life for radioactive decay of 1600 y. How long will it take the amount…

A: Half -life for radio active decay:

Q: he​ half-life of the radioactive element unobtanium-37 is 5 seconds. If 32 grams of unobtanium-37…

A:

Q: What is the half-life of gallium-74 if 30.5 minutes are required for the activity of a sample of…

A: The radioactivity is a process where a radioactive substance undergoes decay to form a stable…

Q: The half-life of radioactive strontium-90 is 28.8 years. How long would it take when only 16.5% of…

A: The half-life of strontium-90 is = 28.8 years Time would it take when only 16.5% of the original…

Q: A 120-mgmg sample of technetium-99 mm is used for a diagnostic test. If technetium-99 mm has a…

A: Solution -

Q: The half-life of Strontium-85 is 65 days. How much of a 80. mg sample is left after 260 days? mg

A: Given: Initial mass of sample = 80 mg  Time passed = 260 days. And the half-life of isotope = 65…

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.