The half-life of tritium is 12.32 yrs. If 49.1 mg of tritium remains of a sample with an initial mass of 252 mg, determine the time that has elapsed

Q: If 3.0 grams of Strontium-90 in a rock sample remained in 1989, approximately how many grams of…

A: In radioactive decay unstable nuclei decay into stable nuclei with emmison of some electromagnetic…

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…

Q: Thorium-234 has a half-life of 24.1 days. Suppose the initial amount of Thorium-234 is 162.9 mg,…

A: All natural and artificial radioactive decays follows first order kinetics The integrated rate…

Q: Strontium-90 Original amount: 5 g Amount left: 0.3125 g Total time: Half-life: 28.8 y Number of…

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Q: The half-life of 234U, uranium-234, is 2.52 105 yr. If 98.9% of the uranium in the original sample…

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Q: atium-90, ause of it: alf-life ot

A: Given data set: Half-life of strontium90 = 28.1 years Mass of strontium90 =  5.2 ng = 5.2*10^-9 g We…

Q: The half-life of Oxygen-14 is 1.177 minutes.  You originally have 20 grams of it.  After roughly 3.5…

A: Given: Half-life of Oxygen-14 is 1.177 minutes Mass of Oxygen-14 is 20 g

Q: If the half-life of 100.0 grams of a radioactive isotope is 8 years, how many grams will remain in…

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Q: A 1.55 g sample of an isotope has a half-life of 3.8 days. What mass of sample is left after 5.5…

A: given data,sample of an isotope or initial amount of sample =1.55 g sample half life =3.8…

Q: What is the element formed after this portion of the decay series?

A: ANSWERE IS GIVEN BELOW :

Q: Moonrock collected by a US Apollo mission is estimated to be 4.30 billion years old by uranium/ lead…

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Q: The half-life of cesium-129 is 32.0 hours. How much time is required for the activity of a sample of…

A: Half life, t1/2 = 32 hours t1/2=32 hoursk = 0.693t1/2=0.69332 hours=0.02166 hour-1

Q: An 39 g sample of an isotope of Strontium-90 was formed in 1960 explosion of an atomic bomb at…

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Q: What mass of Carbon-14 must be in a sample to have an activity of 2.00 mCi?

A: Solution - According to the question - Given - 2.00mCi = 2.00 * 10-3 Ci = 2.00 * 10-3 * 3.7 * 1010…

Q: Cesium-137, which has a half-life of 30.2 yr, is a componentof the radioactive waste from nuclear…

A: The required formula is:

Q: How much of a 0.15 g sample of U-238 after the passage of 3200 years? Half-life is 4.01x10° vears.

A: To determine the amount of 0.15 g radioactive substance left after 3200 years if the half-life is…

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: Half-life of Element X mass How much of the daughter product exists after 2 half-lives? of 60…

A: Answer :-  Amount of daughter element after 2 Half lives = 25%…

Q: Choose the appropriate drop-down to complete the paragraph. Gallium-67 has a half life of 78.1 hours…

A: lf life of Galium-67 = 78.1 hours lf life of Radium- 226= 1600 years

Q: Potassium 40 has a half life of 1.3 billion years.  If no half lives had passed, what percentage of…

A: A numerical problem based on half life period, which is to be accomplished.

Q: A rock containing 238U and 206Pb was examined to determine its approximate age. The sample of a rock…

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Q: A 4.0 g sample of Ra-226 decays to 1.0 g. If the half-life of Ra-226 is 1620 years, how much time…

A: Given initial concentration of Ra-226 = [Ra-226]0 = 4.0 g  Final concentration = [Ra-226] = 1.0 g…

Q: The half life of radium 226 is 1602 years. If you have 500 grams of radium today how many grams…

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

A: Radium-226 is a radioactive element. Here 24 g of the radium sample undergoes radioactive decay. The…

Q: The half-life of tritium is 12.32 yrs.If 49.1 mg of tritium remains of a sample with an initial mass…

A: The question is based on the concept of chemical kinetics. we have to calculate how much time has…

Q: The initial amount of thorium-232 in a rock is determined to be 6.78mg. it now has 5.32 mg of…

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Q: ompare the binding energy of a neutron in 2311Na to that in 2411Na

A: 23Na    →  22Na +  1n M( 22Na) =21.994437 um(1n) = 1.008665 uM(23Na)=22.989770 uMass defect…

Q: A wooden object from an archeological site is subjected to radiocarbon dating. The activity due to…

A: Given, The half life of 14C is 5715 yr. Activity of 14C is 11.6 disintegration per second Activity…

Q: A laboratory investigation shows that a sample of uranium ore contains 5.37 mg of 238/92 U and 2.52…

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Q: The half-life of copper-67 is 61 hours.  If an original sample contains 24 grams how many grams are…

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

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Q: Which one of each pair of nuclides would you expect to have thelonger half-life?a. Cs-149 or Cs-139…

A: The nuclides which have longer-half life has to be given, One can find the stability of the nuclide…

Q: They found out that the half or radium is 1700 years. What percentage of radium may be expected to…

A: Given: Half life of radium = 1700 years

Q: The half-life of Zn-71 is 2.4 minutes. If one had 100.0g at the beginning, how many grams would be…

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Q: how many grams of tritium would you have in 37.5 years?

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Q: How many milligrams remain of a 15.0 mg sam- ple of radium-226 after 6396 years? The half-life of…

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Q: The half-life of carbon-14 is 5730 years. The wrapping of an Egyptian mummy gave off 3.8 counts per…

A: From the given data we haveHalf life of carbon-14=5730 yearsWrapping of mummy=3.8…

Q: The half-life of cesium-129 is 32.0 hours. How much time is required for the activity of a sample of…

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Q: Technetium-99 which has a half life of 6 hours is a useful isotope in diagnostic tests. If a patient…

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Q: An alpha particle is accelerated to 23.1 MeV per particle. What is this energy in kJ/mol?

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Q: If a rock contained 12.0 g of 4°K when the earth was formed 4.54 billion years ago and the half-life…

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Q: Tritium H-3 has a half-life of 12.3 years. If a sample of 3 g of H-3 is produced, what will be the…

A: Given: Amount of tritium taken originally=3g Half life=12.3 years Total time taken=24.6 years Mass…

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

A: Given, sample of radium-226 has mass of 24 gram.

Q: Technetium-99 which has a half life of 6 hours is a useful isotope in diagnostic tests. If a patient…

A:

Q: If the half-life of a radioactive isotope is 3.5 minutes, how many grams of a 200-gram sample would…

A: The interval of time required for a radioactive isotope to decay to one-half of its atomic nuclei is…

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: When will a 1.00 g sample of thorium–232 have a mass of 1.00 mg, knowing that the half – life of…

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Q: A wooden object from an archeological site is subjected to radiocarbon dating. The activity due to…

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

Q: Thorium-227 has a half-life of approximately 19 days. What percentage of an original amount of…

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Q: The half life of Au-198 is 2.7 days. If a sample starts with 100 grams of Au-198, how many grams…

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