If two grams of a radioactive isotope has a half-life of twenty hours, the half-life of one gram of the same substance is O 1 day O 80 hr O 20 hr 40 hr O O

Q: The half-life of bismuth-210, 210Bi, is 5 days.(a) If a sample has a mass of 200 mg, find the amount…

A: Solution-  (a)-The half life periods of Bismuth-210 is 5days.the rate of decay of any substance…

Q: If 1 g of an isotope has a half life of 15 hr, the half life of 0.5 g sample is A. 15 hr B. 30 hr C.…

A: 1 g sample of an isotope has a half - life = 15 hr 0.5 g sample of an isotope has a half - life =?…

Q: bromine-88 is radioactive and has a half life of 16.3 seconds. how long would it take a sample to…

A: Applying concept of radioactive decay as first order reaction.

Q: (11) Lead-211 is a radioactive isotope with a half-life of 36.1 minutes. How long will it take for…

A:

Q: Phosphorus-32 is a radioactive isotope with a half-life of 14.3 d (d = days). A biochemist has a…

A: A radioactive decay follows the first order kinetics where the rate of the reaction depends on the…

Q: The number of radioactive nuclides in a sample decays from 3.80 x to 1020 19 9.50 x 10 in 58.0…

A:

Q: A radioactive isotope has a half-life of 84.3 minutes. How long will it take for the radiation from…

A:

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

A:

Q: Complete the table for the radioactive isotope. Isotope 239 Pu, Half Life (In years) 24100, Initial…

A: The amount of time required by an element to reduce to half its quantity is called its half-life.

Q: 7) Aluminum-29 decays to a silicon-29 nuclide with a half-life of 6.56 minutes. What percent of an…

A: Given -  Half life=6.56minutes Time=18minutes

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

A: Given, half life of Pu -236, t1/2 = 2.86 years            initial mass of Pu -236= 2.35 mg The…

Q: A radioactive isotope has a half-life of 11 minutes.  How many grams of a 18.68 g sample remain…

A: Given Half life = 11minutes = 11*60= 660 second Sample weight = 18.68g Time = 44 minutes = 44*60=…

Q: 1 A radioisotope has a half life of 4 days. How much of a 20-gram sample of this radioisotope…

A:

Q: 1. A 1 kg mass of radioactive material was left to decay in a laboratory. After 12 years, the…

A:

Q: If the half-life of a radioactive substance is 500 million years and you have 48 atoms of it, how…

A:

Q: If you have a sample of radioactive material that weighs 2 grams, and only 1 gram is left that is…

A: Initial nuclei = 2 grams. Reduced nuclei = 1 grams. Time = 5 years. Half life time of material = ?

Q: Carbon-14 has a half life of 5730 years. In a plant fossil, you find that the 14C has decayed to…

A: Given that, half life , t12= of 5730 years. and  14C has decayed to 1/8.00 of the original amount

Q: Phosphorus-32 is a radioactive isotope with a half-life of 14.3 d (d = days). A biochemist has a…

A: Given: Half-life of radioactive nuclei = 14.3 d Initial amount = No = 0.28 g Amount at time ‘t’ = N…

Q: Carbon -14 has a half-life of 5.730 x 10 3 years.  If the original mass of the parent is 501.695 g,…

A:

Q: A tiny piece of paper taken from the Dead Sea Scrolls has an activity of 10.8 disintegrations per…

A: Radioactive disintegration follows first order kinectics. Hence, the rate of decay can be followed…

Q: Iodine-131 has half life of 9 days meaning that after every 9 days the amount of isotope is reduced…

A: The half-life of Iodine-131 is 9 days. Initial amount =10.0 g  Time = 18 days. 18 days means => 9…

Q: A radioactive isotope has a half-life of 41.7 minutes. how long will it take for the radiation from…

A:

Q: A piece of charcoal from a tree killed by the volcanic eruption that formed the crater in Crater…

A: The radioactive decay follows first-order kinetics. We know that the half-life of carbon-14 is 5730…

Q: A 40.0 mg sample of a radioactive substance decays to 10.0 mg in 10 days. What is the half-life of…

A:

Q: Consider a certain type of nucleus that has a half-life of 32 min. Calculate the percent of original…

A: Given: The half life, (t1/2)=32 min. The time of disintegration , (t)=1.9 hrs=(1.9*60)=114 min.…

Q: 1. If the amount of the parent isotope in the original sample of a rock had been 48 grams, about how…

A:

Q: Part 1.1. If a radioactive element has a half-life of 2.5 million years, the amount of parent…

A:

Q: The iodine-131 nuclide has a half-life of 8.0 days. If you originally have a sample containing 728-g…

A: Known: Half-life  = 8.0 days Original mass = 728 g Time elapsed = 6.86 weeks = (6.86 ×7)…

Q: radioactive sample originally contains 8.0g of an isotope with a half- life of 6 days. What is the…

A:

Q: A radioactive isotope decays from 60 grams to 15 grams in 20 seconds. What is its half-life? a) 20…

A: The radioactive decay is an example of first order reaction.

Q: If the half-life of a particle is 2 days, how much of this substance remains after 8 days? Select…

A: Since you have posted multiple questions, we are entitled to answer the first only. Given: Half-life…

Q: 2P is a radioactive isotope with a half-life of 14.3 days. If you currently have 13.5 g of ²P, how…

A: The given data contains, t1/2 =14.3 daysPt=13.5 gP0=7 days

Q: Tc-99m is the most commonly used radioactive isotope in medicine. It is a gamma emitter and has a…

A: The half life of Tc-99 is six hours. There will be two half lives involved in twelve hours. The…

Q: Suppose a certain radioactive substance has a half-life of 2 years. Find how long it will take for…

A: Half life is the time of the reaction in which the reaction is 50% completed. Write the expression…

Q: Phosphorus-32 is a radioactive isotope with a half-life of 14.3 d (d = days). A biochemist has a…

A: Given: Half-life of radioactive nuclei = 14.3 d Initial amount = No = 0.300 g Amount at time ‘t’ = N…

Q: After 60 days, 10 grams of radioactive isotope remains from an original 80 g sample. What is the…

A: Law of radioactive decay: Law of radioactive decay relates the amount radioactive substance…

Q: The half-life of carbon-14 is 5730 years. What does this statement mean? [A] It means that carbon-14…

A: Given: The half-life t12 of carbon-14 is 5730 years

Q: 1.50 moles of a radio nuclide emits 3.09 x 1010 beta particles per second. assumed that each beta…

A: Here 1.5 moles of radio active nuclide emits 3.09×10^10 beta particles per second. We have to…

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: Which of the following radioactive isotopes is the most stable? The half-life of each isotope is…

A: Half life is defined as the time required to decay to half of its original amount.

Q: If the half-life of a radioactive substance is 4 days how much material will remain after 16 days if…

A:

Q: The cesium-131 nuclide has a half-life of 30 years. After 120 years, about 3 g remains. The original…

A:

Q: A radioactive isotope has a half-life of 46.3 minutes. how long will it take for the radiation from…

A:

Q: Iodine-131 is a radioactive isotope. After 6.00 days, 59.6% of a sample of 13I remains. What is the…

A:

Q: What percent of a parent isotope would remain after two half lives?  50% 25% 13% 66

A: Correct option is (b) 25%

Q: 4. The half-life of radioactive radium-224 is 3.50 days. What was the original mass if 0.200 g…

A:

Q: A radioactive isotope has a half-life of 60.2 days. What fraction of the isotope remains after 418…

A: Provided half life(t1/2) = 60.2 days Provided time(t)=418 days Let initial amount= [A•] Let final…

Q: Carbon-14 has a half-life of 5715 years. It is used to determine the age of ancient objects. If a…

A:

Q: The 175Pt isotope has a half-life of 2.53 seconds. What percentage of the original quantity of 175Pt…

A: The radio active decay follows first order kinetics. The half life t1/2 and rate constant K of a…

Q: Iron-59 has a physical half-life of 45 days. If 96 g of a radioactive iron sample (59Fe) is received…

A: