50 ng of a radioactive isotope with a half-life of 23 seconds is expected to decay exponentially. How much of the substance will remain after 10 seconds? Round your answer to the nearest tenth of a nanogram.     20.0 ng 0.7 ng 0.4 ng 37.0 ng

Q: The gallium-67 nuclide is used in tumor diagnostic applications. This has a half-life of 78.2 hours.…

A: given, half life =  78.2 hours  time = 5.00 days

Q: Iodine-131 has a half life of 8 days. Your friend with a thyroid condition is given 40 mg of I-131…

A: Radioactive decay follows the first-order kinetics. The half-life of the first-order reaction does…

Q: Carbon-14 is used in radiocarbon dating. The half-life of carbon-14 is 5.73*10^3 years. How many…

A:

Q: bromine-88 is radioactive and has a half life of 16.3 seconds. how long would it take a sample to…

A: Applying concept of radioactive decay as first order reaction.

Q: Calculate how long it will take for a sample of 234TH with a half-life of 24.1 days to decay to 6.0%…

A: We are given that half life is about 24.1 days, and sample decays to 6% of its original value . We…

Q: The half-life of 218Po is 3.1 minutes. How much of a 146 gram sample remains after 0.40 hours? 130…

A: Since the decay reactions are first order reactions And we know that the relationship between the…

Q: Co-60 is used extensively in radiotherapy as a source of y-rays. Its half life is 5.27years. a) How…

A: half life = 5.27 years

Q: Half-life is the time required for a radioactive element to decay to half of its original mass.…

A: Given: The % of original radium sample=100% The % of a sample of radium that has decayed=75% The…

Q: Radioactive radon-222, found in many homes, is a potential health hazard. The half-life of radon-222…

A: The spontaneous breakdown of the nucleus causes the release of energy and matter from the nucleus,…

Q: At the beginning of an experiment, a scientist has 348 grams of radioactive goo. After 75 minutes,…

A: Radioactive decay follow first order kinetics. The integrated rate law for the first order reaction…

Q: The half-life of a radioactive nucleus is 1.5 x 10-8 s. What is this half-life in milliseconds (ms),…

A: The half-life of a radioactive nucleus is 1.5 x 10-8 s.

Q: 2. If you have 100 grams ofa radioactive isotope with a half-life of 10 years a. How much of the…

A: GIVEN   half life =10 years we know half life (T1/2) =0.693K  , where k = decay constant  K= 0.69310…

Q: A medical technician is working with the four samples of radionuclides listed in the table below.…

A: Radioactive decay follows the first-order kinetics. The half-life of the first-order reaction does…

Q: Carbon-14 has a half life of 5730 years. In a plant fossil, you find that the 14C has decayed to…

A: Given that, half life , t12= of 5730 years. and  14C has decayed to 1/8.00 of the original amount

Q: Which statement accurately summarizes why radiocarbon dating could be used for some samples but not…

A: Radiocarbon dating could be used for some samples but not others beacuse of:

Q: Prehistoric cave paintings were discovered in a cave in France. The paint contained 16% of the…

A:

Q: An isotope of the element erbium has a half-life of approximately 15 hours. Initially there are 23…

A: Given that : The half-life of erbium = 15 hours The initial mass of erbium = 23 g

Q: life of 1.27 × 109 yr. The age of a mineral sample that has a mass ratio of 40Ar to 40K of 0.330 is…

A: The answer is given as follows

Q: 8. Strontium-90 has a half-life of 28.1 years. Starting with 2.08 mg of this isotope, what is the…

A: Radioactive decay follows first order kinetics. Using this we will calculate all parts of questions.

Q: At the beginning of an experiment, a scientist has 244 grams of radioactive goo. After 105 minutes,…

A:

Q: Carbon-11 radioactively decays by positron emission with a half-life of 20.4 minutes. If a dosage of…

A: Given that : The half-life of carbon-11 = 20.4 min We have to calculate the % of carbon-11 will…

Q: One of the radioactive isotopes used in chemical and medical research is iodine-125, which has a…

A: Given Half life of I-125 = 61 days [I-25]t = 0.25 g[I-25]0 = 1 gNow As we know radioactive decay is…

Q: 1. Sodium-24 is a diagnostic radioisotope used to measure blood circulation time. How much of 20.0…

A:

Q: A certain isotope has a half-life of 2.00 days. How much of a 4.00g sample of this isotope will…

A: Since the decay reactions are first order reactions Hence we can say  1) Half life = ln(2) / K 2)…

Q: The Cl isotope is a radioactive isotope that emits beta radiation and has a half-life of 40 minutes.…

A: Amount of sample left after 80 minutes (2 half lives) can be calculated as: A=Ao2n=0.4022=0.10 moles…

Q: 40K decays to 40Ar with a half-life of 1.27 x109 years.  The age of a mineral sample that has a mass…

A:

Q: Decide whether each of the following statements makes sense (or is clearly true) or does not make…

A: Half life time of any compound means the time required for a compound to be decayed to its half of…

Q: If the half-life of C-14 is 5730 years, how much C-14 would be left from a 5000 year-old sample that…

A:

Q: Gallium-67 is used medically in tumor-seeking agents. The half-life of gallium-67 is 78.2 hours. If…

A:

Q: Radioactive Radon-222 gas (222Rn) occurs naturally as a product of uranium decay. The half-life of…

A:

Q: Plutonium-236 is an alpha emitter with a half-life of 2.86 years. How long will it take for the 1.15…

A: Radioactive decays follows first order kinetics. For the for order kinetics: k = 0.693 / t1/2 t =…

Q: At the beginning of an experiment, a scientist has 192 grams of radioactive goo. After 90 minutes,…

A: Initial mass, final mass, time required for radioactive goo are given for which relevant questions…

Q: Cobalt-60 is used extensively in medicine as a source of g-rays. Its half-life is 3.97 years. How…

A: Given: Half-life of Co-60 = 3.97 years = 3.97 × 365 = 1449.05 days…

Q: A medical technician is working with the four samples of radionuclides listed in the table below.…

A: The radioactive decay is a first order reaction.Hence rate is proportional to concentration of moles…

Q: Platinum has a naturally occurring radioisotope, Platinum – 190, with a half – life of 6.50 x 10"…

A:

Q: A sample has a half life of 100 years. If it has been 200 years since it started to decay and there…

A: The question is based on the concept of chemical kinetics. we have to calculate initial mass of the…

Q: Platinum has a naturally occurring radioisotope, Platinum – 190, with a half – life of 6.50 x 10"…

A: The half-life data given for different isotopes are,

Q: Carbon-14 has a half-life of 5730 years. In a plant fossil, you find that the 14C has decayed to…

A:

Q: Carbon-11 is a radioactive isotope of carbon. Its half-life is 20.3 minutes. What fraction of the…

A: When the rate of the reaction is directly proportional to the first power of the concentration of…

Q: A medical technician is working with the four samples of radionuclides listed in the table below.…

A: The radioactive decay follows first order kinetics. The rate law is rate = k [Reactant} Rate = k x N…

Q: The half-life of radium-226 is 1.8x103 years. How many hours will it take for a 2.50-gram sample to…

A: Interpretation-  To determine how many hours will it take for a 2.50-gram sample to decay to the…

Q: A radioactive element has a physical half-life Tp = 200 days and a biological half-life T, =70 days.…

A: Given : Physical half life of element = 200 days. Biological half life of substance = 70  And Amount…

Q: long after an animal dies will it take for the C14 to decrease by 60 percent (to 40 percent of its…

A: Answer  Calculate the half life

Q: When a radioactive isotope decays and the resulting isotope is also radioactive, it will decay, and…

A: a. Half-life of Rn-222 is 3.8 days.

Q: If 1.50 gram of a 2.00 gram sample of a radioactive substance undergoes decay in 60 minutes, then…

A:

Q: A radioactive isotope has a half-life of 60.2 days. What fraction of the isotope remains after 418…

A: Provided half life(t1/2) = 60.2 days Provided time(t)=418 days Let initial amount= [A•] Let final…

Q: What is the half life of sodium-24 if after 12 days the sample has a mass of 1.2 g from an initial…

A: Given, Initially mass of the sample (N0) = 9.6 g Mass of the sample after 12 days (N) = 1.2 g Time…

Q: Phosphorus-32 has a half-life of 14.0 daysdays. Starting with 2.00 gg of 32P32P, how many grams will…

A: Hello. Since your question has multiple parts, we will solve the first question for you. If you want…

Q: A specimen of charcoal found contains 57% as much 14C as a sample of present day charcoal. What is…

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

Q: Hydrogen-3 is radioactive and has a half life of 12.3 years. How long would it take a sample to…

A: Given that -  Hydrogen-3 is tritium which is a radioactive isotope with half life = 12.3 years…

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.