An unknown radioactive element decays into non- radioactive substances. In 320 days the radioactivity of a sample decreases by 74 percent. (a) What is the half-life of the element? half-life: 164.09 (days) (b) How long will it take for a sample of 100 mg to decay to 80 mg? time needed: 53 o 53.008190404685 (days)

Q: Cobalt-60 has a half-life of 5.24 years. (a) Find the mass that remains from a 100-mg sample after…

A: t=Duration of half life=5.24 years k=Constant C=Mass of Cobalt=100 mg…

Q: Element X decays radioactively with a half life of 11 minutes. If there are 300 grams of Element X,…

A: Given information: The half life h =11 min, there are 300g of element X. To find: The time it will…

Q: 6. A chemist has a 20-mg sample of polonium-218. He needs exactly 81.5% of it for an experiment.…

A:

Q: Salt (NaCl) decomposes in water into sodium (Na*) and chloride (CI) ions according to the law of…

A: By law of uninhibited decay we have.      A=A0ekt t denotes the time. A0 denotes the initial amount…

Q: A grey squirrel population was introduced in a certain county of Great Britain 35 years ago.…

A:

Q: Radium-221 has a half-life of 30 sec. How long will it take for 83% of a sample to decay?

A: If Ao is initial amount of Radium-221. substance, h is half-life of substance and t is elapsed time.…

Q: Strontium 90 (Sr-90), a radioactive isotope of strontium, is present in the fallout resulting from…

A: The answer is found in step-2

Q: 2. Fermium-253 has a half-life of 33 days. (a) If we start with 1,200 mg, how much Fermium-253 will…

A: Fermium-253 has a half life of 33 days, that means Fermium-253 will take 33 days to reduce its…

Q: 5. The decay constant for a particular radioactive element is 0.015 when time is measured in years.…

A: Given: The deacy constant for a particular radioactive element is 0.015 when time is measured in…

Q: 30% of a radioactive substance has decayed after 10years, what is its half-life? 15.9 years 16.7…

A:

Q: During a preliminary survey of an asteroid, chemical analysis indicated that a certain radioactive…

A:

Q: Strontium 90 (Sr-90), a radioactive isotope of strontium, is present in the fallout resulting from…

A: the amount decreases by (1/2)^nLwhere n is the number of half life yearsso ,(1/2)^n = 1/32solving…

Q: 1. The population of Kuhala Island doubles every 3 decades. 2. The amount of radioactive isotope of…

A: Whether each given is an exponential function, exponential equation, or exponential inequality or…

Q: Suppose a sample of a certain substance decayed to 65.8% of its original amount after 300 days. (Ro…

A: Given that the substance decayed to 65.8% of its original amount after 300 days. (a) To determine…

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

A: Let 100 be the original mass 64.3% of 100 is  64.3100 of 10064.3100·100=64.3 Now we find out decay…

Q: Radon-222 has a half-life of 4.00 days. Given its mass 5.937 gram at a certain time, what was the…

A: We will find out the required value.

Q: 4. Te- 105 has a half life of 203.9 hours. If there are 1054 g of Te - 105 initially, how long will…

A:

Q: A grey squirrel population was introduced in a certain county of Great Britain 35 years ago.…

A:

Q: c. A certain radioactive material is known to decay at a rate pr amount present. If after one hour…

A: Lets say amount of the radioactive material present at time 't' be 'N'.

Q: Strontium-90 is a radioactive substance that decays according to the following function, where yo is…

A:

Q: Strontium-90 has a half-life of 28 days.(a) A sample has a mass of 50 mg initially. Find a…

A:

Q: The decay rate for a radioactive isodope is 2. Find the hal&-1ife of de isodoge.

A:

Q: What is the third-life of Woosterium-21? That is, find the time it takes a sample of Woosterium-21…

A: Exponential Decay Law A=A0e-kt t - time A - amount of sample after time t A0 - amount of sample at…

Q: Strontium-90 has a half-life of 28 days. a. A sample has a mass of 50 mg initially. Find a formula…

A: Explained below

Q: Determine the initial amount of radioactive substance if after 22 years, the remaining unconverted…

A: To find the initial amount of radioactive substance decay rate and half-life of the substance…

Q: A certain element decays at a rate of .000163/year. Of a piece of this element of 450 kg, how much…

A:

Q: 9. The half-life of a radioactive element can be modelled by M = Mo (-)" where Mo is the initial…

A: If y=f(x), then the independent variable x is called the input of the function, and the dependent…

Q: Element X decays radioactively with a half life of 9 minutes. If there are 170 grams of Element X,…

A: Given- Element X decays radioactively with a half life of 9 minutes and there are 170 grams of…

Q: Radon-222 decays at a continuous rate of 17.3% per day. How much will 250 mg of Radon-222 decay to…

A: Radon-222, a noble gas resulting from the decay of naturally occurring uranium-238, is the first…

Q: Cobalt-60 has a half-life of 5.24 years. How long would it take a 100 mg. mass to ecay to 2 mg.?…

A:

Q: Half-Life Decay Rate, k 3929 years   k=____

A:

Q: Radium-221 has a half-life of 30 s. How long will it take for 95% of a sample to decay?

A: Given that Radium-221 has a half life of 30 seconds. We need to calculate how long will it take for…

Q: Strontium-90 is a radioactive isotope with a half-life of 29 years. Strontium-90 is a major…

A: The half-life , T12 , is calculated using the formula, T12=ln 2λ , where, λ is the decay constant.…

Q: 1. The half-life of Plutonium-239 is 24,100 years.  10 grams of Plutonium-239 were released in a…

A: As per Bartleby guidelines for more than one question asked only one is to be answered please upload…

Q: 6. The half-life of radium is 1690 years. (a) Compute the decay constant k ( 5 decimal places)

A: Given: The half-life of radian that is 1690 years. N0=10 g t=50 years

Q: a radioactive element decays according to the fuction A(t)= A0 e-0.0319t, where t is in years. a. if…

A: a. amount of the element which would remain after 5 years is 426 grams b. the half-life of the…

Q: 5. A small metal bar, whose initial temperature is 20°C, is dropped into a container of boiling…

A: According to newton law of cooling: dTdt=-k(T−Ta​)  Where T is the Temperature of the body and Ta is…

Q: Radioactive Radium Radium-221 has a half-life of 30 s. How long will it take for 95% of a sample to…

A: For decay of radioactive element                 Half life = ln 2decay constant         t12  = ln 2λ…

Q: Radon-222 has a half-life of 4.00 days. Given its mass 5.488 gram at a certain time, what was the…

A: Given that, Radon-222 has a half-life of 4.00 days. Given its mass 5.488 gram at a certain time We…

Q: 1. Carbon 14 is a common form of carbon which decays over time. The initial amount of carbon 14…

A: Please see the below pictures for detailed solution.

Q: Element X decays radioactively with a half life of 8 minutes. If there are 460 grams of Element X,…

A:

Q: Express the hourly decay rate as a percentage to two decimal places.The half-life of Erbium-172 is…

A:

Q: 16,830 people work in a particular occupation at the present time. The number of people working in…

A: Given:- in present time No. Of worker are= 16830 No. Of people decreasing per year are= 0.2%

Q: A tumor is injected with 0.7 grams of Iodine-125, which has a decay rate of 1.15% per day. To the…

A: The exponential function A = P * (1 - r)t  where A is the final amount and P is your inital amount.…

Q: 9. A sample of tritium-3 decayed to 94.5% of its original amount after a year (a) What is the…

A: Consider N (t) is the amount of tritium-3 relative to the original amount, then general form is,

Q: 6. Determine the initial amount of radioactive substance if after 22 years, the remaining…

A:

Q: Element X decays radioactively with a half life of 9 minutes. If there are 760 grams of Element X,…

A: Formula for half life is as below : N(t)=19 gramsN0=760t = ?t12=9 minutes

Q: (a) After 20 years, 15% of the initial mass of the radium has decayed. (i) Find the half-life period…

A:

Q: Radium decompose in air at the rate proportional to the amount present. If initially there 20 grams,…

A:

Estimation

A new framework of data analysis where the new statistical methods are used for interpreting the results and analyzing the data is known as estimation in statistics.