A certain radioactive substance has a half-life of 38 hour. Find how long (in hours) it takes for 90% of the radioactivity to be dissipated.

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

A: Given,The half-life of Radium-226 is 1590 years. i.e., h=1590A sample contains 200 mg.…

Q: The isotope cesium-137 has a half-life of 29.75 years. How long will it take a 100 gram sample of…

A: To determine the time taken for 100 gram sample of cesium-137 to decay to 75 grams.

Q: A certain radioactive substance has a half-life of 38 hr. Find how long it takes for 80% of the…

A: Given that: Half life, t1/2=38 hr

Q: A wooden artifact from an ancient tomb contains 30 percent of the carbon-14 that is present in…

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Q: The half-life of Radium-226 is 10 years. How much of an initial 138 g sample will remain after 49…

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Q: The​ half-life of radium is 1690 years. If 80 grams are present​ now, how much will be present in…

A: We have given the half life of radium is 1690 years.And the present amount of radium is 80 grams…

Q: How much of a 500g sample of potassium-42 is left after 62 hours if the half life of potassium-42 is…

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Q: The half-life of a radioactive substance is 15 days. If we started with 20 g, how much of the…

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Q: You have 10 ounces of a radioactive substance with a half-life of 5 hours. How long will it be until…

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Q: The radioactive element polonium-210 has a half-life of 138 days. If you have 100 micrograms of…

A: The half-life equation for radioactive decay is:

Q: You have 128 grams of a radioactive kind of strontium. If its half-life is 51 days, how much will be…

A: ln e= 1 ln ab=b ln a

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

A: It is given that the half-life of the plutonium isotope is 24,360 years. Use formula, an exponential…

Q: The half-life of Radium-226 is 1590 years. If a sample contains 500mg, how many mg will remain after…

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Q: The radioactive isotope Carbon-14 has a half-life of 5,730 years. Given 300 grams of C-14, what is…

A: topic - exponential function

Q: The half-life of Radium-226 is 1590 years. If a sample contains 300 mg, how many mg will remain…

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Q: A hospital prepares a 200 mg supply of molybdenum-99 which has a half-life of 66 hours. How much…

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Q: The half-life of Radium-226 is 1590 years. If a sample contains 400 mg, how many mg will remain…

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Q: The half-life of radium is 1620 years. If a laboratory has 12g of radium, how long will it take…

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Q: Find the half-life (in hours) of a radioactive substance that is reduced by 1515 percent in 6060…

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Q: The half-life of carbon-14 is about 5730 years. If 1 gram of carbon-14 is present in a sample, how…

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Q: The half-life of Strontium-90 is 28.79 years. If a sample contains 490 mg, how many mg will remain…

A: Given half life is 28.79 years Initial mass =490mg To calculate mass after 180 years.

Q: The half life of a certain isotope is 8.5 hours. If we have a sample of 10 ounces of that isotope,…

A: Consider the following information: Half life periodt12=8.5 hours Decay constantλ=ln2t12=ln28.5…

Q: Nobelium is a radioactive isotope that has 25 seconds half-life. How long will it take for Nobelium…

A: The formula to calculate the amount of radioactive isotope is N=Noe-λt where N is the rest amount No…

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

A: Half life of the plutonium isotope is 24,360 years. If 10g of plutonium is released into the…

Q: A radioactive substance has a half-life of 3000 years. If you start with 100 kg of it, how much will…

A: In 1 half life amount becomes half of its initial value. After n half life it becomes 1/2n of its…

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

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Q: The half-life of plutonium-241 is approximately 13 years. How much of a sample weighing 4 g will…

A: The half-life of plutonium-241 is 13 years. We have to find how much sample of 4 g will remain after…

Q: The half-life of radioactive radium (226Ra) is 1599 years. What percent of a present amount of…

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Q: The half-life of Radium-226 is 14 years. How much of an initial 143 g sample will remain after 43…

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Q: The half-life of radioactive strontium-90 is approximately 29 years. In 1965, radioactive…

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

A: Radioactive decay

Q: The half-life of strontium-90 is 28 years. How many years will it take a 56 mg sample to decay to a…

A: Given : Half -life of strontium-90 is 28 years . T1/2 = 28 years

Q: Find the half-life (in hours) of a radioactive substance that is reduced by 5 percent in 15 hours.

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Q: The​ half-life of radium is 1690 years. If 40 grams are present​ now, how much will be present in…

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Q: Find the half-life (in hours) of a radioactive substance that is reduced by 10 percent in 90 hours.

A: Half-life = 0.693/(Decay constant)

Q: The half-life of Radium-226 is 1590 years. If a sample contains 100 mg, how many mg will remain…

A: Given half life =1590 years t0=100, time =0t1=50, time =1590t2=25, time = 2(1590)t3=12.5, time =…

Q: A certain radioactive substance has a half-life of 38 hours. Find how long it takes for 90% of the…

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Q: Radioactive radium has a half-life of approximately 1599 years. The initial quantity is 15 grams.…

A: Given that a radio-active radium has a half-life of approximately 1599 years and initial quantity is…

Q: A particular isotope has a half-life of 1 minutes.  If you start with 1 gram of this isotope, how…

A: To determine: A particular isotope has a half-life of 1 minutes.  If you start with 1 gram of this…

Q: The half-life of radioactive strontium-90 is approximately 27 years. In 1963, radioactive…

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Q: If 12 g of a radioactive substance are present initially and 8 yr later only 6 g​ remain, how much…

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Q: If 16 g of a radioactive substance are present initially and 9 yr later only 8 g​ remain, how much…

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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: A tumor is injected with 0.7 grams of Iodine-125, which has a decay rate of 1.15% per day. To the…

A: The exponential function A = P * (1 - r)t  where A is the final amount and P is your inital amount.…

Q: The half-life of a radioactive material is about 34.2 years. How much of the material is left after…

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Q: A radioactive isotope, selenium, used in the creation of medic has a half-life of 119.77 days. If…

A: In order to calculate the mass of selenium after 20 days, we need to use the formula of radio active…

Q: A radioactive substance has a half-life of 4 hours. How much of it is left after 12 hours?

A: Since, a radioactive substance has a half-life of 4 hours.Our aim is to calculate the amount of…

Q: If 250 mg of a radioactive element decays to 200 mg in 48 hours, find the half-life of the element.

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Q: The half-life of Cobalt-60 is 14 years. How much of an initial 107 g sample will remain after 27…

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Q: The​ half-life of radium is 1690 years. If 40 grams are present​ now, how much will be present in…

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