If 14 g of a radioactive substance are present initially and 8 yr later only 7 g​ remain, how much of the substance will be present after 18 ​yr?

Q: A scientist puts 250 grams of radioactive radium having a half-life of 1690 years into a concrete…

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Q: Suppose a scientist has a fossil sample with 180 g (grams) of carbon-14. If its original amount of…

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Q: In a given population of men and women, 20% of the men are married and 25% of the women are married.…

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Q: The half-life of Palladium-100 is 4 days. After 16 days a sample of Palladium-100 has been reduced…

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Q: A sample of a newly discovered element, West Virginium, has a half-life of 425 years. How long will…

A: Given half life of element is 425 years t1/2. Initial weight A0 is 803 mg and after decay is 401.5…

Q: The half-life of Palladium-100 is 4 days. After 12 days a sample of Palladium-100 has been reduced…

A: Given, The half-life of Palladium-100 is 4 days. After 12 days a sample of Palladium-100 has been…

Q: The half-life of Palladium-100 is 4 days. After 12 days a sample of Palladium-100 has been reduced…

A: Half life formula is  N(t)=N012tt(half) N(t) is the final mass N0 is the initial mass half life is…

Q: The half-life of Palladium-100 is 4 days. After 16 days a sample of Palladium-100 has been reduced…

A: Solution:-step-1 half-life-formula A=a12thA=final amounta=initial amountt=timeh=half-lifeA=2t=16…

Q: A bacteria culture doubles in size every 80 hours.  A. Find the r for this population (rounds to…

A: Part a) To the value of r fo the population, in the formula A=A0ert In this formula A0 is the…

Q: A certain hermit wants to design a reactor using radioactive material A that will be converted into…

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Q: If 8 g of a radioactive substance are present initially and 4yr later only 4.0g​ remain, how much of…

A: Initially 8 gm is present. After 4 yrs, 4 hm remained. To calculate after 9 yrs.

Q: A sample of a newly discovered element, West Virginium, has a half-life of 170 years. How long will…

A: We have to find the time required.

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

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Q: The half-life of polonium is 139 days, but your sample will not be useful to you after 94% of the…

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Q: 1. If you have 100 grams of a radioactive isotope with a half-life of 10 years: a. How much of the…

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Q: A radioactive material decomposes half of its amount per minute. If after 2 mins, 100% undecayed…

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Q: A small metal bar, whose initial temperature was 15° C, is dropped into a large container of bowling…

A: Given Initial temperature=15°C temperature increase to=22°C in 1 second.

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

A: Given information: Initial amount=Q0=7 mgHalf life=t12=5730 years

Q: If 14 g of a radioactive substance are present initially and 9 yr later only 7 g remain, how much of…

A: Initial mass M0=14g , after t=9 yr the remaining mass M=7g We have t=1λlnM0M Therefore λ=1tlnM0M or,…

Q: A sample of radioactive material decayed to half of its original amount in 4 years. How long did it…

A: Given: A sample of radioactive material decayed to half of its original amount in 4 years To…

Q: A sample of radium has a weight of 1.5 mg and a half life of approximately 6 years. How much of the…

A: Given Data: The weight of the sample of radium is: W=1.5 mg The approximate half-life of the sample…

Q: IF 8G OF RADIOACTIVE SUBSTANCE ARE PRESENT INITIALLY AND 4 YR LATER ONLY 4G REMAIN HOW MUCH OF THE…

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Q: What costs $60 million per gram and can beused to treat brain cancer, analyze coal for its sulfur…

A: Logarithmic functions and exponential functions are considered as inverses of each other as one…

Q: The half-life of Palladium-100 is 4 days. After 12 days a sample of Palladium-100 has been reduced…

A: answer: The amount of radioactive substance after 't'  days is given byN=N0e-λtwhere N0-initial…

Q: Strontium-90 has a half-life of 29 years. If there are 400 grams of strontium initially, how much,…

A: Strontium-90 has a half-life of 29 years, there are 400 grams of strontium initially.

Q: If 14 g of a radioactive substance are present initially and 4 yr later only 7 g remain, how much of…

A: Since the amount dropped to 1/2 of the initial amount over a period of 4 years, you can assume the…

Q: suppose a sample of a certain substance decayed to 77.2% of its original amount after 300 days. (two…

A: Let t        = time in daysN(t)  =remaining quantity of certain substance at any time 't'No…

Q: The half-life of Palladium-100 is 4 days. After 12 days a sample of Palladium-100 has been reduced…

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Q: 1. Strontium-90, 90Sr, has a half-life of 29 years. a) If 42.5 grams remain after 50 years, what is…

A: The formula for the quantity remaining of a substance after t years is: Nt=N012tt12 Here, t12=…

Q: If 12g of a radioactive substance are present initially and 9yr later only 6g​ remain, how much of…

A: As half the amount of the radioactive substance left after 9 years, thus it is clear that half-life…

Q: The half-life of Palladium-100 is 4 days. After 12 days a sample of Palladium-100 has been reduced…

A: According to the problem, we have

Q: The half-life of a radioactive isotope is the time it takes for a quantity of the isotope to be…

A: To calculate the amount of mass of after 6 half-lives if the initial amounts of radioactive isotopes…

Q: 2. Suppose a nuclear accident releases 50 kilograms of the element Cesium 137. If the half life of…

A: Given- Intial amount of Cesium-137 is 50 kg and half life is 30 years. To find- The amount after 30…

Q: The half-life of plutonium-239 is 24,360 years. If 10 g of plutonium is released into the atmosphere…

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Q: The half-life of a radioactive isotope Is the time It takes for a quantity of the Isotope to be…

A: Given query is to find the amount after 4 half life.

Q: Suppose a population of bacteria in a Petri dish has a tripling time of 6 hours. How long will it…

A: Given the population of bacteria in a Petri dish has a tripling time of 6 hours. Let the initial…

Q: 15. A ball drops from a height of 120 dm. If each time it strikes the ground it bounces 3/4 of the…

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Q: A small metal bar, whose initial temperature was 15° C, is dropped into a large container of bowling…

A: We know that, the standard form of Newton's law of cooling: T-T∞=T0-T∞e-kt Where; T∞ is the ambient…

Q: The half-life of Radium-226 is 1590 years. a) If a sample contains 200 mg, how many mg will remain…

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Q: A small metal bar, whose initial temperature was 30° C, is dropped into a large container of boiling…

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Q: At the beginning of an experiment, a scientist has 352 grams of radioactive goo. After 225 minutes,…

A: Consider that a scientist has 352 grams of radioactive goo. After 225 minutes, the sample decays to…

Q: A culture of bacteria has an initial population of 210o bacteria and doubles every 4 hours. Using…

A: given that : P0=2100d=4

Q: An isotope has a half-life of 108 years. How much of a 16-gram sample is left after 250 years? .....…

A: The solution are next step

Q: The half-life of polonium is 139 days, but your sample will not be useful to you after 82% of the…

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Q: The half life of a radioactive isotope is 70 years. If 150 grams of the isotope is originally…

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

Q: If 16 g of a radioactive substance are present initially and 5 yr later only 8 g​ remain, how much…

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Q: If 18g of a radioactive substance are present initially and 4 yr later only 9g​ remain, how many gs…

A: It is simple unitary method problem.

Q: The half-life of Palladium-100 is 4 days. After 12 days a sample of Palladium-100 has been reduced…

A:

Q: The half-life of Palladium-100 is 4 days. After 20 days a sample of Palladium-100 has been reduced…

A: Solution

Q: The half-life of strontium-90 is 28 years. How long will it take a 60-mg sample to decay to a mass…

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