5.00 hours of decay, 3.4g of the substance remain. What is the

Q: The half-life of strontium-90 is 28.0 years. How many grams of this nuclide in a 4.60-g sample will…

A: Half-life time t12=0.696k;   k is decay constantandt=1kln(m0m)m0 is mass of at time t=0m is mass of…

Q: a. Two or more nuclei combine to form one larger nucleus in the process of nuclear_ i) fission, ii)…

A: We need to fill answers for the given short questions.

Q: The half-life of strontium-90 is 28 years. H

A: Given t1/2 of a reaction is 28 years  decay constant  (λ) λ = 0.693t1/2     = 0.69328 y     =…

Q: How much time is required for a 6.25-mg sample of 51Cr to decay to 0.75 mg if it has a half-life of…

A: The initial amount of the sample = 6.25 mg The amount of sample after time t = 0.75 mg. The…

Q: A sample of lead isotope Pb decays by emitting an alpha particle to form the nuclide W. If the half-…

A: Radioactive Decay is the process where an unstable atomic nucleus loses energy in the form of…

Q: How many half lives will it take for 50 g of "Tc to decay to 6.25 g?

A: Half-life period was discovered by ernest Rutherford in 1907. Rutherford applied the principle of a…

Q: 137 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: Data given,  Half-life period of 137Cs, t1/2 = 30.2 years Initial amount, No = 100.0 g Amount left,…

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: Half-life of Cs is 30.2 years. Intial amount sample = 100 g  Final amount sample = 1.00 g

Q: A 2.00 gram radioactive substance undergoes decay.  After 60 minutes, 1.50 grams have decayed.  What…

A: Radioactive decay generally follows first-order kinetics and for first-order kinetics:…

Q: 3) 120g of Chromium-48 decays. After 6 half-lives, how much of the original nuclei would remain?

A: Given,  Initial amount of Chromium - 48 is 120g. After 6 half lives the original nuclei would remain…

Q: A) A piece of charcoal that has one-half the radioactivity of a living tree died approximately 5,568…

A: Radioactive decay follows first order kinetics. It has the following relation between t1/2 and k: k…

Q: A sample of Carbon is observed to have 15g left after an estimated time of 10000years. Determine the…

A:

Q: What is the age in years of mummified primate skin that contains 6.25% of the original quantity of…

A: We have to predict the age in years.

Q: A rock contains 0.257 mg of lead-206 for every milligram of uranium-238. The half-life for the decay…

A: The first-order rate law can be transformed into another highly useful equation with the decay…

Q: An unknown radioactive element decays into non-radioactive substances.  In 660 days the…

A: Rate constant (k)= 2.303/t log 100/49 So k = (2.303/660) ×0.3098 =0.0011 days ^-1

Q: 24 Am is used in many home smoke alarms. It has a decay half-life of 457 years. How long does it…

A: All radioactive decay follows first order kinetics. So in order to solve for the time required we…

Q: An 80 g sample of radioisotope decayed to 10 g after 24 days. What was the total number of grams of…

A:

Q: What is the age of mummified primate skin that contains 8.25% of the original quantity of 14C?

A: The half-life of C-14 is 5730 years. The formula for half-life is given by, t1/2=0.693k where k is…

Q: The half-life of thorium-227 is 18.72 days. How many days are required for three-fourths of a given…

A:

Q: It takes 870.98 years for carbon-14 to decay to 90 mg. What is the half life of carbon-14?

A:

Q: A certain radioactive material is known to decay at a rate proportional to the amount present. If…

A: Consider the given information is as follows; Initial amount N0 = 500 mg Amount after 3 Nt years =…

Q: 44. Cobalt-60 has a half decay, how many grams

A: The answer is given as follows

Q: Decay of carbon-14 by b emisson creates which element

A: Beta-decay is radioactive decay where a fast electron is emitted.

Q: How long long does it take for 78 % of sample of cobalt-60 to decay (the half life is 5,26 years)?

A: The rate of a reaction is expressed as: Rate = k[A]n where k is the rate constant, [A] is the…

Q: Radium-223 decays with a half-life of 11.4 days. How long will it take for a 0.240 mol sample of…

A:

Q: A hazardous material was found to decay at a rate proportional to the amount present. Initially,…

A:

Q: Isotope X goes through a BETA decay and becomes isotope Y. Isotope Y goes through an ALPHA decay and…

A:

Q: 9) Complete the following scheme for 4K decays: (B decay or electron capture or a decay)

A:

Q: What is the half-live of a radioactive isotope if it takes 6.2 days for a 72g sample to decay to…

A: Given, 72 g to decay to 18 g. t = 6.2 days To calculate the half-life.

Q: Co-60 is used extensively in radiotherapy as a source of y - rays. Its half-life is 5.27 years. a)…

A: Given, t1/2 = 5.27 years (a) The time required to decrease the activity by 35% of its original value…

Q: an artifiact has a carbon-14 concentration that is 12.5%(1/8th) of that found in living organisms.…

A:

Q: How long does it take for 87.5% of each isotope to decay? Kr-91 Kr-89 min Kr-79 h Kr-81 yr

A: A radioactive isotope's half-life is the time taken for one-half of the isotope to decay. A…

Q: 14Cdecays by B-emission and after 12.0 h, ninety percent of the radioactive substance remains.…

A:

Q: decay

A: T1/2 = 28 yrs N = 0.40 g No = ? at T = 56 years

Q: A piece of cloth is discovered in a burial pit in Benguet, Philippines. A tiny sample of the cloth…

A: Radioactive decay follows first order kinetics.  We know that : t = (1/k)*ln(a0/at) ...(1)  (a0/at)…

Q: Carbon-14 has a half-life of 5730 yearsyears. In a plant fossil, you find that the 14C14C has…

A: Given data:

Q: What fraction of the decay energy is this, noting that the decay mode is π0 → ϒ+ϒ (so that all the…

A:

Q: 137Cs has a half-life of 30.2 years. How many years will it take for a 100.0-g sample to decay to…

A: Since you have posted multiple independent questions in the same request, we will solve the first…

Q: A rock contains 0.257 mg of lead-206 for every milligram of uranium-238. The half-life for the decay…

A: The first-order rate law can be transformed into another highly useful equation with the decay…

Q: Even though plutonium−239 (t1/2 = 2.41 × 104 yr) is one of the main fission fuels, it is still a…

A: All radioactive processes are first order reactions.

Q: 65 Predict the mode of decay Ni undergoes. Positron Alpha Beta It is stable and does not undergo…

A: Given that  Decay of 65Ni

Q: Zinc-62 decays with a half-life of 9.186 hours. 1. Write the balanced nuclear reaction of Zn-62 as…

A: As per the rules, only three sub-parts can be answered:

Q: A wooden artifact from an ancient tomb contains 30 percent of the carbon -14 that is present in…

A:

Q: A volcanic eruption melts a large area of rock, and all gasesare expelled. After cooling, ⁴⁰₁₈Ar…

A: Half-life of potassium-40 = 1.25 x 109 year A = The final amount of 40 K left = 1.38 mmol  A0 =…

Q: the half-life of aluminum 26 is .74 million years. Suppose an asteroid contained 800 kg of aluminum…

A: The half-life of aluminum 26 is 0.74 million years. The mass of aluminum 26 present in asteroid is…

Q: The half-life of a particular radioactive isotope X is 10.0 days. (1) Determine its decay constant.…

A: half life = 10.0 days.

Q: what is it's half-life?

A:

Q: Predict the mode of decay begin 65^ Ni undergoes.

A: The heavier isotopes having mass number more then 200 under go alpha decay. Light isotopes( mass…

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.