If the half-life of a radioactive substance is 500 million years and you have 48 atoms of it, how many half-lives will have passed by the time that 6 atoms of the substance remain? A. 2 В. 5 О с. з D. 4

Q: atom 16. Phosphorus- 32 has a half-life of 14.3 days and is used in the treatment of 32/16 leukemia,…

A: Beta particle decay:                               A Beta particle is a high energy electron that…

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: A dinosaur remain has a C-14 isotope and has a half-life of 5,715 years. The activity of this is…

A:

Q: Carbon-14 measurements on the linen wrappings from the Book of Isaiah on the Dead Sea Scrolls…

A: Given in the question, 79.5% of the carbon-14 is found in living tissue. Half life of C-14 = 5730…

Q: How many half‑lives of the unknown radioactive substance have occurred?

A: As we know that decay of radioactive substance follows first order kinetics

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: While exploring a coal mine, scientists found plant fossils which had been preserved by an…

A:

Q: A patient receives 9.0 ng of a radioisotope with a halflife of 12 h. How much will remain in the…

A: Radioactive elements are those which undergoes the spontaneous reactions (may be fusion or fission)…

Q: If the half-life of a parent material is 10 Ma, and about 88% (rounded) has decayed to daughter…

A:

Q: Torgeir is on a geology field trip and finds a meteorite that contains 10 times more argon-40 than…

A: Radioactive decay of material follows first order kinetics.  Half life is defined as the time…

Q: At the beginning of an experiment, a scientist has 348 grams of radioactive goo. After 75 minutes,…

A: Radioactive decay follow first order kinetics. The integrated rate law for the first order reaction…

Q: An artifact is found that has 33% of the 14C it had when it was living. How long ago was this…

A:

Q: A 1.00-gram sample cantains two radioactive isotopes A and B. The half-life of isotope A is 2 hrs.…

A:

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

A:

Q: A piece of a spear handle is found in an archaeological dig in Central America. It contains 12.5% as…

A:

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

A:

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: A radioactive isotope decayed to 17/32 of its original mass after 60 minutes. Find the half-life of…

A: All radioactive decays follows first order kinetics . The integrated rate equation for first order…

Q: 27 30 A transmutation experiment was conducted at Al P + Y CERN where an aluminum atom was 13 15…

A: Given,  Aluminum atom was bombarded with an alpha particle     Required,                         X,…

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

A:

Q: At the beginning of an experiment, a scientist has 228 grams of radioactive goo. After 135 minutes,…

A: Hi! there, since there are multiple questions posted. We are answering first question. If you need…

Q: about how much would have been left after three half-lives? A parent isotope has a half-life of 500…

A: Note : As per guidelines we can answer only the first question   The time it takes for the…

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

A: We have to predict the amount left after certain time.

Q: lead (214Pb82) decays to bismuth (214Bi83) emitting negative beta particles with a half-life of…

A: answer =  1.1846 x 10-11 curie

Q: At the beginning of an experiment, a scientist has 244 grams of radioactive goo. After 105 minutes,…

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: Carbon-11 radioactively decays by positron emission with a half-life of 20.4 minutes. If a dosage of…

A: Given that : The half-life of carbon-11 = 20.4 min We have to calculate the % of carbon-11 will…

Q: An unknown radioactive substance has a half-life of 3.20 hours. If  20.8 g of the substance is…

A:

Q: 35. If the half-life of a radioactive isotope is 200 years, and a specimen contained 5 grams of…

A: A radioactive element has a highly unstable atomic nucleus and they spontaneously disintegrate to…

Q: 26. Four hundred grams of a radioactive substance decays to 50.0 grams. If it has a half-life of…

A:

Q: A radioactive waste from a clinical laboratory contains 0.2 µCi (microcuries) of calcium-45 (45Ca)…

A: Answer -

Q: 24. A radioactive substance weighing 18.00 grams undergoes radioactive decay in 12.5 days and has…

A:

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: 1. After 119 days have elapsed, 1/12 of a radioisotope sample remains undecayed. What is the…

A: We’ll answer the first question since the exact one wasn’t specified. Please submit a new question…

Q: A 1.00 g sample of Ge decays to 0.87 g in 1.9 hr. What is the half-life of Ge ? 32 a. 0.073 hr b.…

A: Decay reactions are first order reactions. Given : Initial mass of reactant = 1.00 g Final mass of…

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: The initial amount of the radioactive material V in a rock is determined t be 6.78 mg. Only 1.46 mg…

A: When we study the kinetics of any chemical reaction that means how slow or fast reaction is, then…

Q: A 180.9 ng sample of an unknown radioactive substance was placed in storage and its mass measured…

A:

Q: If the initial sample is 8.00 g, what mass of the original iridium-192 remains after 105 days? 0.675…

A:

Q: Rubidium-87 decays by B production to strontium-87 with a half life of 4.7 × 1010 years. What is the…

A:

Q: How many half-lives did a radio-active sample complete is 2.5 g of a sample remains from 20.0 g…

A: Half-life time: The time in which the concentration of the radioactive species decreases to half is…

Q: carbon-14 activity

A: Given data, Basic equation is Ae = Ao x 0.5 (t / t1/2)   Therefore,

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

A:

Q: the half life of molybdenum -99 is 67 hr. a 200 ug quantity decays, over time, to 25 ug. how much…

A: Here given, Initial amount (N0) = 200 ug Amount left undisintegrated (N) = 25 ug Half life (t1/2) =…

Q: 1. A sample of einsteinium-252 decayed to 64.3% of its original mass after 300 days. a) What is the…

A: The rate law for the 1st order reaction is given by, k=1tln[A]0[A] where k is the rate constant, t…

Q: How long will it take a radioactive sample of iodine-131 (half-life 8.07 d) to lose

A: The spontaneous disintegration of alpha, beta and gamma radiations by a substance irrespective of…

Q: How many half lives must have passed for an isotope with a half life of 10 years to decay from 1600…

A: The radioactive decay follows the First Order kinetics.