Cesium-137 has a half-life of approximately 30 years. How much of a 40-gram sample would be left after 90 years? 20 g 16 g 8 g 5 9

Q: An unknown radioactive element decays into non-radioactive substances. In 1000 days the…

A: Radioactive elements follow the law of natural decay. That means the rate of decay of a radioactive…

Q: The half-life of Carbon-14 is 15 years. How much of an initial 183 g sample will remain after 38…

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Q: A wooden artifact from an ancient tomb contains 35 percent of the carbon-14 that is present in…

A: We have to find out time

Q: A radioactive substance has a half-life of 29 years. What percent remains 80 years after being…

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Q: The half-life of Radium-226 is 5 years. How much of an initial 170 g sample will remain after 22…

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Q: The amount of radioactive substance after t years is modeled using A=Cekt. a one kilogram sample has…

A:

Q: The half-life of Radium-226 is 6 years. How much of an initial 178 g sample will remain after 23…

A: Initial amount of Radium-226 is A0 = 178 g The half life of Radium-226 is t12 = 6 years Total Time,…

Q: The half-life of Carbon-14 is 10 years. How much of an initial 138 g sample will remain after 49…

A: Radioactive decay.

Q: A wooden artifact from an ancient tomb contains 25 percent of the carbon-14 that is present in…

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Q: The half-life of Carbon-14 is 11 years. How much of an initial 119 g sample will remain after 44…

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Q: The half-life of a radioactive substance is 25 years. Suppose we have a 100 mg sample. Find the mass…

A: For a radioactive substance N(t)=N0×e-λt                --> Eq'n(1)…

Q: A wooden artifact from an ancient tomb contains 20 percent of the carbon-14 that is present in…

A: I have stated the used formula in the solution.

Q: The half - life of the radioactifive substance Carbon- 14 is approximately 5750 years. Suppose an…

A: Given that the half-life of the radioactive substance carbon-14 is approximately 5750 years. Suppose…

Q: Uranium 235 is used as fuel for some nuclear reactors. It has a half-life of 710 million years. How…

A:

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 : A sample of radium has a weight of 1.5 mg and a half-life of approximately 6 years.

Q: The half-life of Carbon-14 is 14 years. How much of an initial 143 g sample will remain after 43…

A: use t half formula

Q: A sample of radium metal has a weight of 1.5 mg and a half-life of approximately 6 years

A: sample of radium metal has a weight of 1.5 mg and a half-life of approximately 6 years

Q: The half-life of Strontium is 28 years. Suppose we have a 80 mg sample. How long will it take the…

A: Given: The half-life of Strontium is 28 years. We have to find the duration to take the sample to…

Q: The half-life of Carbon-14 is 5 years. How much of an initial 154 g sample will remain after 26…

A: Given data- A = The amount present at time(t). h = The material's half life. A∘= The amount of…

Q: After 15 years, one fourth of the initial mass of radioactive substance has decayed. a) Find the…

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Q: Yttirum-90 has a half-life of 64.10 hours. Given an initial mass of 582 grams of the sample, how…

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Q: The half-life of a radioactive kind of americium is 16 hours. If you start with 1,320 grams of it,…

A: Radioactive decay

Q: An unknown radioactive element decays into non-radioactive substances. In 660 days the radioactivity…

A: According to the given information, an unknown radioactive element decays into non-radioactive…

Q: Radium decomposes at a rate proportional to the amount present. In 100 years, 100 mg of radium is…

A:

Q: Cobalt-60 has a half-life of 5.24 years. a. Find the mass that remains from a 100-mg sample after 20…

A: (a) Consider the mass remains from m0 mg sample after n years as m(t). The exponential equation can…

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

A:

Q: wooden artifact from an ancient tomb contains 25 percent of the carbon-14 that is present in living…

A: We have given that a wooden artifact tomb contains 25 percent of the carbon-14 that is present in…

Q: Strontium-90 has a half-life of 29 years. Beginning with a 10 mg sample, find how long it takes for…

A:

Q: 40 grams of radioactive material decays to 35 grams in 20 years. Find the half-life.

A: In this question we need to find the half life of the given radioactive material

Q: Radium decomposes at the rate proportional to the present amount. If the half- life is 1600 years,…

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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:

Q: The half-life of silver-105 is approximately 41 Step 2 of 3: How much of a 2 gram sample or

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Q: . A 90 g sample of plutonium-238 has a half-life of 88 years. How long will it take for this sample…

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Q: A laboratory test confirms that 9 milligrams of a particular radioactive substance decreases to 7…

A: Answer and explanation is given below... Option (c) is correct

Q: Nuclear engineering If radium has a half-life of 1600 years, how much of 100 mg will re- main after…

A:

Q: The half-life of Cobalt-60 is 6 years. How much of an initial 121 g sample will remain after 34…

A: The half-life of Cobalt-60 is 6 years, initial amount 121 g sample How much Cobalt-60 remain after…

Q: Q5: A sample contains 1 gram of Radium. Will more than 0.5 gram of Radium remain after 1000 year?…

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Q: A scientist investigating a new type of bacteria has created the following model for the population…

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Q: Californium-253, a radioactive isotope with applications in nuclear energy and medicine, has a…

A: Given Initial weight of californium-253 S0=50 gram Half life time λ = 18 days

Q: Radioactive Radium Radium-221 has a half-life of 30 s. How long will it take for 95% of a sample to…

A: For decay of radioactive element                 Half life = ln 2decay constant         t12  = ln 2λ…

Q: The radioactive isotope of potassium **K which is used in the diagnosis of brain tumors, has a…

A:

Q: Radon-222 has a half-life of 4.00 days. Given its mass 5.488 gram at a certain time, what was the…

A: Given that, Radon-222 has a half-life of 4.00 days. Given its mass 5.488 gram at a certain time We…

Q: Element X decays radioactively with a half life of 8 minutes. If there are 460 grams of Element X,…

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Q: A laboratory test confirms that 9 miligrams of a particular radioactive substance decreases to 7…

A: Explanation of the answer is as follows

Q: Strontium-90 has a half-life of 28 days.(a) A sample has a mass of 50 mg initially. Find a…

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Q: The half-life of Carbon-14 is 11 years. How much of an initial 115 g sample will remain after 42…

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Q: The half-life of silver-105 is approximately 41.3 days. Step 3 of 3: How much of a 2 gram sample of…

A: In this question we have to find amount remains After 6 days.

Q: The half-life of Plutonium-241 is 9 years. How much of an initial 159 g sample will remain after 38…

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Q: 21. Strontium-87 is used in the study of bones. After one hour, 78.1 mg remains of a 100 What is the…

A: Radioactive decay follows the first-order kinetics. To calculate the half-life of Strontium-87 first…

Q: The half-life of Cobalt-60 is 8 years. How much of an initial 180 g sample will remain after 23…

A: