2. The half-life of radon-222 is 3.8 days. How much of a 100 gram sample is left after 15.2 days?

Q: If the amount of a radioactive element decreases from 0.36 g to 90. mg in 22 min, what is its…

A: Half-life (t1/2) is defined as the time required by a substance to reduce to half of its initial…

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Q: A rock contains 0.257 mg of Pb-206 for every milligram of U-238.The half-life for the decay of U-238…

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Q: Of an initial amount of7000g of​ lead-210, how much will remain in120​years? Lead-210 decays at a…

A:

Q: If you start with 71.0 grams of a radioactive substance with a half life of 3 days, how much will be…

A: Here given, Initial amount (N0) = 71 grams Half life (t1/2) = 3 days Time (t) = 15 days Amount left…

Q: The radioactive nuclide has a half-life of 5.27 years. Calculate the mass of that remains from…

A: The amount of time that passes is a whole number multiple of the radioactive nuclide half-life.…

Q: The half-life of selenium-83 is 22.3 min. If a sample contains 24.0g of selenium-83, how long will…

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Q: Selenium-73 decays by positron emission with a half-life of 7.15 hours. What mass remains from a…

A:

Q: Plutonium – 236 is an alpha emitter with a half-life of 2.86 years. If a sample initially contains…

A: Given data Half life : t1/2=2.86 year Initial amount : No=2.56 mg time : t=7 year…

Q: The half-life of Po-218 is 3.1 minutes. How many grams of Po-218 would be left after 9.3 minutes, if…

A: M

Q: How much of a 0.15 g sample of U-238 after the passage of 3200 years? Half life is 4.01×10⁹ years.

A: Given: Mass of sample = 0.15g Duration of decay= 3200 years. Half life= 4.01×109 years To find: The…

Q: Cs-134 has a half-life of 2.0 years. How much of a 2.50-g sample of this isotope will remain after…

A: Given :- half life of Cs-134 = 2.0 years                Initial amount of sample = 2.50-g  To…

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

A: Given -> Half life = 3.82 days

Q: Krypton-85 has a half life of 10 years. Approximately what percentage of Kr-85 produced from the…

A:

Q: The radioactive nuclide has a shelf-life of 17.5 hours. What mass remains from 0.0100g sample after…

A: Shelf-life of 17.5 hours, Calculate the mass remains from 0.0100 g after 24 hours.

Q: If the half life of a radioactive isotope is 3 minutes, how much of an 8 Ci sample would remain…

A:

Q: A radioactive isotope has a half-life of 12.0 seconds. How much of a 100 gram sample is left after…

A: Given  Initial Mass of Sample ( A)0  = 100 gram  Half life time ( t1/2)   = 12 sec  Time ( t ) = 36…

Q: Iodine-131 has a half-life of 8.0 days. How long will it take 10 μg of 131I to decrease to 1/100 of…

A: We have given the half life of 131I that is t1/2 = 8 days from this we can find the out the decay…

Q: What percentage of a radioactive sample remains after 3 half-lives? O 25% O 12.5% O 6.25% O 3.125%

A: No of half lives=3 Percentage of radioactive sample=?

Q: A The balf-life of barium-131 is 12 days. How many grams remains after 60 days if the initial sample…

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Q: For the nuclear reaction 239 94 ° Pu + U+ ?, 235 92 what is the missing particle? OHe He Submit

A: Balancing nuclear reactions :-  In case of nuclear reactions    sum of atomic numbers of Reactants =…

Q: Radium-226 is radioactive and has a half life of 1600. years. How long would it take a sample to…

A: The emission of energy in the form of the ionizing radiation is called radio decay.This radiation…

Q: The half-life of 51Cr is 2.78×101 day. Calculate how much time it would take for an isolated…

A:

Q: The half–life of a radioactive material is 7.04 days. Assuming you start with a 1.45 mg sample, how…

A: Given , Half life = 7.04 days Time , t = 16 days Initial Weight of sample = 1.45 mg

Q: Bismuth-209 has a half-life of 2.01 x 1019 years.  How long will it take for 6.92 kg of bismuth-209…

A: We have to predict the time taken.

Q: The half-life of oxygen-15 is 124 ss. If a sample of oxygen-15 has an activity of 4800 BqBq, how…

A: Half-life of a reaction is the time at which the initial concentration of the reactant becomes half.…

Q: Radon-222, 222/86 Rn, has a half-life of 3.823 days. How long will it take a sample of radon-222…

A: we know, the rate constant isK=λ=ln2t1/2=0.69313.823 dK=0.1813 d-1

Q: How much of a 24-gram sample of Radium-226 will remain unchanged at the end of three half-life…

A: 19) Given : Initial mass of radium-226 = 24 g And time passed = 3 half lives.

Q: 145 g sample of radioactive has a half live of 6.4 days how many g of material is left are 2 half…

A: The time required to disintegrate the molecule to half of its initial concentration is called the…

Q: Cobalt-60 is commonly used as a source of beta-particles. How long does it take for 87.5% of a…

A: Radioactive decay is associated with the emission of small energetic particles e.g. beta particles,…

Q: Lead-211 is a radioactive isotope with a half life of 36.1 minutes.  How long will it take for only…

A: Chemical kinetics is branch of chemistry that deals with rates of chemical reactions.

Q: A radioactive sample contains 2.45g. How much willl remain after 11.4 days? (Half life is 3.8 days)

A:

Q: Fluorine-21 has a half life of approximately 5 seconds. What percent of the original nuclei would…

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Q: A sample of radioactive radon-222 was found to have a half-life of 3.823 days. What fraction of the…

A:

Q: The half-life of bismuth-212 is 1 hour. If 12g of bismuth are allowed to decay, what mass of bismuth…

A: The time taken during a reaction to reduce the concentration of a reactant to half of its initial…

Q: Cobalt-60, which undergoes beta decay, has a half-life of 5.26 yr. What is the activity of the…

A: The activity of a radioactive sample is measures as `N_0` counts per minute at. The activity of a…

Q: The half-life of Po-214 is 0.001 seconds. How much of a 10 gram sample is left after 0.003 seconds?…

A: We know radioactive decay follows first order reaction kinetics, therefore  t1/2=0.001 s and…

Q: 3. Suppose a sample of carbon-243 has a half-life of 3427 years. How long does it take for 80% of a…

A: In this question, we have to find out the correct answer of given problem by the help of the…

Q: A 26.00-g sample of water containing tritium, 3 1H, emits 1.50 * 103 beta particles per second.…

A: In radioactive decay, radioactive atom's nuclei (unstable) eject energy as well as charged particles…

Q: If you have 2.00 grams of a radioisotope, with a half-life of 5 days, how much of the isotope is…

A: Given;

Q: a) Mrs. Price's son, Liam is currently working as a boilermaker at the Darlington Nuclear Power…

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Q: An 80.0 g sample of iodine-131 was placed in a sealed vessel forty days ago. Only 2.5 g of this…

A: Decay reactions are first order reactions. Since we know that the relationship between the amount of…

Q: The half-life of radon-222 is 3.8 days. How much of a 100 gram sample is left after 15.2 days?

A: Half life is the time taken by the original compound to reduce to it's half.

Q: A radioactive sample has a mass of 500 grams. How much remains after two half-lives?

A:

Q: Bi−210 is a beta emitter with a half-life of 5.0 days If a sample contains 1.0 g of Bi−210, how many…

A: Half life of a reaction is the time required for a reacton to complete it's half. That is, in half…