Your lab has been given a radioactive sample and you determine that the decay constant is 3.00 x 10-6 s-1 and that the activity at that time is 56.0 µCi. You are then asked to determine the number of nuclei that will decay in the time interval between 5.00 and 7.00 hours after you received the sample.
Q: Part A A sample of U (T1=1.59 × 10° yr) contains 6.10 × 1018 nuclei. Part B Approximately how many…
A:
Q: Sihle, an archaeologist from UWC finds an ancient wooden axe handle at an excavation site at…
A: Write the expression of decay rate. N=N0e-tt1/2
Q: λ =
A: Deacy of an unstable atom is defined by the radioactive decay law. It states that the probability…
Q: The radioactive plutonium isotope, 239Pu, has an half-life of 24 100 years and undergoes alpha…
A:
Q: You have a 5.2 mol pure sample of an unknown material. After 1.2 h, you discover that 56% has…
A: Given that The initial number of the moles of the sample is No = 5.2mol Since…
Q: As a health physicist, you are being consulted about a spill in a radiochemistry lab. The isotope…
A: Given: The spill of 131 Ba is A0=400 mCi. The half life is T=12 days. The radiation level fallen is…
Q: X The greatest concentration of iodine in the body is in the thyroid gland, so radioactive…
A: The activity is given as Since 1 Bq is 1 decay/second, in 1 hour (3600 seconds), the total number…
Q: Consider the nuclei Sn with an atomic number of 50 and mass number is 118 . Determine its mass…
A:
Q: P5 A reindeer owner finds a 5-year-old reindeer roast in his freezer. When the steak was placed in…
A:
Q: How much is the mass of the sample in grams of Po-218 that has an activity of 5.00 x 1019 Bq? The…
A: Given Activity = rate of disintegration = 5 × 1019 Bq = 5 × 1019 disintegration/second Half life =…
Q: How many half-lives would it take for 6.02×10 ^23 nuclei to decay to 6.25%(0.376×10^23) of the…
A: Initial no. Of nuclei( No) =6.02×1023 Final no. Of nuclei(N)=0.376×1023 ;(6.25% of initial no. Of…
Q: The charred bones of a sloth in a cave in Chile represent the earliest evidence of human presence at…
A: Given, Specific activity of bone (N)=5.22 disintegrations per minute per gram of carbon (d/min.g).…
Q: A moon rock collected by a U.S. Apollo mission is estimated to be 4.00 billion years old by…
A: Given Mass (m) = 1.375 g Half-life of U238 t12 = 4.47×109 years Present time…
Q: A radioactive sample with a half-life of 3.1 s initially has 10,000,000 nuclei. What would be the…
A: The activity is R=11955.3677Bq
Q: A radioactive sample has an initial activity of 6.55 x 10°Bq (1Bq is one disintegration per second).…
A: Given, initial activity N0 = 6.55 x 109 Bq After t=4 hours, activity N = 1.02 x 108 Bq Half life…
Q: A radioactive sample with a half life of 4.8 weeks has 3.05e+15 nuclides present in the initial…
A:
Q: The decay chain of uranium includes radon, a noble gas. When uranium in the soil decays to radon, it…
A: The activity is 0.22 Bq = 0.22 decays/sec. The energy generated by each alpha decay is E = 5.5 MeV.…
Q: Half-life of radioactive element 13153I is 8.0252 days. (A) Its decay constant, λ (B) Percentage…
A:
Q: A sample of a radioactive isotope with a decay constant of λ = 4.27 × 10-3 s-1. A sample of the…
A: we know activity R =λN where λ = decay constant N = number of particle given N = 2.68 × 1015…
Q: Problem A You have a 3 mol pure sample of an unknown material. After 3.7 h, you discover that 20%…
A: We can use the equation for radioactive decay: N(t) = N0 e^(-λt) where,N(t) is the amount of…
Q: The radioactive isotope (95Nb) has a half-life of 35 days. A sample containing this isotope has an…
A: Half life , T12 = 35 days =35 x 24 = 840 hours Initial Activity , A0 = 4.5 x 108 Bq T1 = 36 hours…
Q: A 85 kg patient swallows a 31 μCi beta emitter with a half-life of 5.0 days, and the radioactive…
A: Given data: The mass of the patient is m=85 kg. The radiation is R=31 μCi. The half-life is…
Q: A student carries out a radioactive decay experiment. She measures the activity of a source as a…
A: Dear student Activity is defined as rate of radioactive decay of nuclei. It is denoted by R = ¥ N…
Q: A typical person of mass 65 kg contains 0.35% potassium, by weight. Of the potassium, 0.012% is 40K,…
A: Given: The mass of person is m=65 kg. The half life of nucleus is t1/2=1.28×109 y. The activity due…
Q: A piece of charcoal used for cooking is found at the remains of an ancient campsite. A 1.00-kg…
A: Solution: Given that mass m = 1 kg Living material has an activity equal to 15.0 decays/min per…
Q: Radium-226, 226Ra, undergoes an alpha decay. The current sample of Radium-226 has an initial…
A:
Q: Mass spectrometric analysis of potassium and argon atoms in a Moon rock sample shows that the ratio…
A:
Q: You are assisting in an anthropology lab over the summer by carrying out 14C dating. A graduate…
A: Let A denote the activity of the sample, t denote the time taken n decay. The time taken for n…
Q: Gamma rays may be used to kill pathogens in ground beef. One irradiation facility uses a 60Co source…
A: The total amount of energy of gamma rays per beta decay of 60Co can be given as, Here, ε represents…
Q: In 1991, two hikers in the Alps, between Italy and Austria, discovered the remains of a…
A:
Q: A student carries out a radioactive decay experiment. She measures the activity of a source as a…
A: Given: The activity of the substance is given as below. Rt=714e-0.41×t…
Q: A sample of radioisotope has a decay constant of 9.978x107 s1 and prepared with an initial activity…
A:
Q: For a fission reaction, 1.92 x 1016 J of energy is released. What is the mass defect in kg?
A:
Q: • Part A A battery's voltage is measured using a voltmeter with resistance 10.00 k2; the result is…
A:
Q: How long does it take for the activity of a sample of sodium-22, which has a half-life of 2.6 y, to…
A:
Q: Plutonium has a decay constant of 2.75 × 10-16 s-1. Activity of 1 g of sample will be 0.678x106 Bq.…
A:
Q: 90 A small building has become accidentally contaminated with radioactivity. The longest-lived…
A: Given data : Strontium atomic mass A = 89.9077 u Half life of strontium t1/2 = 29.1 year…
Q: A sample of radioisotope has a decay constant of 9.978×107 s1 and prepared with an initial activity…
A: Given: The decay constant of the radioactive sample is 9.978x10-7 s-1. The initial activity of the…
Step by step
Solved in 2 steps with 9 images