49. The half life of C0-60 is 5.2 years. How many mg of a 1000 mg sample will remain after 9.50 years? 0.1332 mg 0 mg 0.693 mg 0.283 mg

Q: If a tree dies and the trunk remains undisturbed for 1.155 x 104 years, what percentage of the…

A:

Q: A sample of sodium-24 chloride contains 0.050 mg of Na-34. After 20.7 h, 0.019 mg of Na-34 is left.…

A: Any radioactive decay is a first order reaction. For the decay reaction, the decay constant K is…

Q: The half-life of Sr is 28 years. How long will it take for a given sample of Sr to be 68% decomposed…

A: Radioactive decay reactions are the process of decaying radioactive elements like 90Sr. During the…

Q: 120 mg sample of technium 99m is used for a diagnostic test. if a technium 99m has a half-life of…

A: Given- Initial mass = 120 mg Half life = 6.0 hrs To find- milligrams of the technetium 99M sample…

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

A:

Q: A sample of a newly discovered element, West Virginium, has a half-life of 155 years.  How long…

A:

Q: The 14C in a bone has a disintegration rate of 4000 dis h1. The half life of 14C is 5730 years.…

A: The rate of disintegration is proportional to the number of atoms left after a time (N) as- Where…

Q: 1. How many half-lives have passed for Pb-210 after 89.2 years? _____ half-lives (HL)  2. How much…

A: The given radioactive element is Pb-210, any radioactive element is unstable and hence undergoes…

Q: The rate constant for the decay of a radioactive isotope is 3.1x 103/day. What is the half-life of…

A: Given is a radioactive isotope with rate constant = 3.1×10–3/day . We need to find the half life of…

Q: Halfnum-172 (172Hf) has a half- life of 1.87 years. How much is left of a 100 mg sample after 5…

A:

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: A certain drug has a half-life in the body of 7.0 h. What should the interval between doses be, if…

A: Given that : The half-life of the drug = 7.0 h Let the initial concentration of the drug be x

Q: If a tree dies and the trunk remains undisturbed for 13,589 years, what percentage of original…

A:

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

A:

Q: What is the half-life of a sample if after 40 years 12.5g of an original 0.4kg sample is left?

A: Given that,  Initial mass of sample = 0.4 kg = 400 g  Mass of sample left after after 40 years =…

Q: A radioactive substance decays at a rate proportional to the amount present. If 45 percent of a…

A: Given :   Time (t) = 20 years  Percentage of substance decays = 45 %

Q: How many half lives have passed if we measure 1 µg/g parent isotopes and 15 µg/g daughter isotopes…

A: Given: The amount of parent isotope in the rock sample = 1 μg/g The amount of daughter isotope in…

Q: Phosphours-32 is a commonly used radioactive nuclide in bichemical research, particularly in sutdies…

A: Mass of P-32 present in 175 mg of  Na332PO4 Molar mass of  Na332PO4 = 164 g/mol  164 g  Na332PO4…

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 nuclide 9038Sr is one of the extremely hazardous species in the residue of nuclear power…

A: First the rate constant value is calculated.

Q: At t = 0s, you have a pure sample of an unknown substance. At t = 28 s, 36.8% of the substance…

A:

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

A:

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: PLutonium-239, one of the radioactive by-products of nuclear power, represents a serious was…

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

Q: How many half-lives have passed for Polonium-218 after 9.15 minutes? _____ half-lives (HL)  2. How…

A: The isotope given is Polonium-218. Half life of Polonium-218 isotope is 3.10 min

Q: The half-life of Plutonium-241 is 9 years. How much of an initial 190 g sample will remain after 31…

A: The half-life of Plutonium-241, t1/2 = 9 years Initial mass of Plutonium-241, No = 190 g time…

Q: Determine the time required for a sample of cesium-137 to decay until only 1/8 of the original…

A:

Q: Phosphorus-32 is a commonly used radioactive nuclide in biochemical research, particularly in…

A: To determine the remaining mass of phosphorus-32 (\ce 32P) in an original sample after a certain…

Q: Carbon 14 decays to carbon12. The half-life of the C14 isotope is 5730 years. 3000 years after an…

A:

Q: Vhich of the following is the half-life ( in days Jof a radioisotope if it decays to 10.5% of its…

A:

Q: Element X has a half-life of 6 hours. How much of X remains from a 64kg sample after one day?

A:

Q: What is the half-life of the isotope with the decay profile shown here? Half-life definition-the…

A:

Q: 3. The isotope 212Bi has a half-life of 1.01 yr. What mass, in mg, of a 2.00 mg sample will remain…

A:

Q: isotope of technetium (technetium-99m), has a half-life of 6 hours. A hospital has a sample which…

A: Half life = 6 hoursInitial amount of technetium-99m = 36 mgTime = 12 hours.

Q: The 1st-order decay of a particular radioactive element has a half-life of 1.234 days. How many…

A: Given information, Half-life = 1.234 days Time (t) = 5.67 days Initial mass = 891.0 grams

Q: he half-life of 14/6 C is 5730 years. If a mummy wrapping contains about 1/2 as much 14/6 C as…

A:

Q: The half-life of radioactive chromium-51 is 28 days. If a sample of chromium-51 has a mass of 12.0…

A:

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.