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. 0.11 hr c. 4.5 hr d. 9.5 hr 14 hr е.

Q: 2. A sample of iodine-126 with an original mass of 15.00 mg loses 13.125 mg of the original mass of…

A: When the quantity is reduced to one-half of the original of a radioactive sample, then the time…

Q: The radioactive decay of a sample containing an unknown radioactive isotope produced 6274…

A: Given Initial disintegration = 6274 Final disintegration = 1898 Time = 15.31 days

Q: Bandages can be sterilized by exposure to gamma radiation from cobalt-60, which has ahalf-life of…

A: Given: The mass of the sample is 5.27 Y. The half-life of cobalt-60 is 5.27 y.

Q: Skeletal remains had lost 85%of the C-14 they originally contained. Determine the approximate age…

A:

Q: The half-lives of different radioisotopes are given in the table. Radioisotope Half-life (min)…

A: We know that,→ Radioactivity Phenomena follow first oroen kinetics.So, Rate = KA1 K → Rate…

Q: The first-order decay of radon has a half-life of 3.823 days.  How many grams of radon remain after…

A: Ans

Q: 7) The half life of silicon is 710 years. 40 grams are present now, how much will be present in 200…

A:

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: 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: 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: [Refere A 1.14 g sample of a radioactive isotope decays to 0.87 g in 36.3 hr. What is the half-life…

A: Given  Initial Amount [ A ]0   = 1.15 gram  Remaining Amount [ A ]    = 0.87 gram  Time ( t ) = 36.3…

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

A:

Q: How much time in minutes would it take for a 2.301 g sample of 3H to decay to a mass of 1.789 g if…

A: The initial concentration (N0), final concentration (N), and time (t) required to convert the…

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: The answer should be 26.7 days

A: Half-life:The time taken for half disintegration of radioactive element from its original amount is…

Q: 1.) Carbon-14 has a half-life of 5600 years. If you had a sample of 100% carbon-14, how much would…

A: Given, carbon-14 half life with 100 % carbon-14 sample.we are asked to calculate the amount of…

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

A:

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: The decay of radon has a half-life of 3.823 days. How many grams of radon remain after 7.22 days if…

A: given 1) + 1/2 = 3.823 days 2 ) no = 250 gm 3) +  = 7.22 days  find out λ and N

Q: A sample of Uranium-234 has been decomposing. If the original mass of 234U is 2.57milligrams, how…

A:

Q: Suppose the amount of a certain radioactive substance in a sample decays from 1.60 mg to 900. µg…

A:

Q: The half-life of a certain radioactive element is 800 years. How old is an object if only 12.5% of…

A: Given, Half Life t1/2 = 800 years. A = 12.5%  Ao = 100 %  Time , t = ?

Q: A skull believed to belong to an ancient human being has a carbon-14 decay rate of 6.50 dis/min.g of…

A: Radioactive disintegration follows first order reaction and decay rate equation can expressed as,…

Q: In the next step of the neptunium-237 decay series, very unstable francium-221 is produced.  Given…

A: Here we are required to find the amount of Francium 221 remain after 7.32 minutes.

Q: A sample of iodine-126 with an original mass of 15.00 mg loses 13.125 mg of the original mass of the…

A:

Q: 19. The half-life of the radio-isotope iodine - 131 is 8 days. What fraction of the original iodine…

A: Half life of the reaction is the time in which the reactant becomes half of the initial reactant. It…

Q: 90 The half-life of "Sr is 28 years. How long will it take for a given sample of "Sr to be 83%…

A: 1) half life = 28 years  Decomposed = 83 %  2) half life = 39.4 days

Q: The carbon-11 isotope has a half-life of 20.3 minutes. How long (in hours) will it take for 99.9999%…

A: Here we have to determine time required for 99.9999% of a carbon-11 sample to disappear.Given half…

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 that,Initial amount of sample = 1.55gHalf life time = 3.8 daysTime = 5.5 days

Q: 187 Cs has a half-life of 30.2 years. How many years will it take for a 100.0-g sample to decay to…

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: 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: 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: Gold - 198 is used in the diagnosis of liver problems. If the half-life of Au - 198 is 2.69 days:…

A: The correct answer is given below

Q: A moon rock collected by a U.S. Apollo mission is estimated to be 3.50 billion years old by…

A: Given : Time = 3.50 billion years old. Mass of uranium-238 = 1.540g Half life = 4.47 x 109 years

Q: Substance Q initially weights 120% of its remaining mass after its decay in 60 minutes. What is its…

A: Given  substance Q initial weight =120% of its remaining mass after its decay for 60 mins t=60…

Q: The half-life of 90Sr is 29 years. What fraction of the atoms in a sample of 90Sr would remain 175…

A:

Q: lodine-131 has a half-life of 8. l days. How much of 2 g of the isotope will remain after 56.7 days?…

A: Half-life of iodine = t1/2 =  8.1 days intial amount = A0 = 2 g  final amount = A =  ? g  Time given…

Q: A laboratory investigation shows that a sample of uranium ore contains 8.11 mg of U (molar mass…

A: Given data: Mass of U-238 = 8.11 mg Mass of Pb-206 = 2.33 mg Half-life of U-238 = 4.5 x 109 years…

Q: 5. A tree falls in a forest. How many years must pass before the carbon-14 mass in the tree's carbon…

A: Suppose Initial amount = Ao Amount at time, t = 3.125% Ao  Half-life, t1/2 = 5570 years

Q: 0 Question 9 180pb has a half-life of 25.5 s. If a sample of this isotope is initially 750.0 g, what…

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: Half-life of Element X mass How much of the parent isotope and daughter product exists after 1…

A: We need to determine how much of an isotope is left after first half life.

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: 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…

Writing and Balancing Nuclear Equations

A nuclear equation is a symbolic representation of a nuclear reaction using certain symbols. It is studied in nuclear chemistry and nuclear physics.