Kindly help me answer the following: It takes 35 days for a 512 g sample of element X to decay to a final amount of 4 g. What is the half-life of the element X? The half-life of Oxygen-15 is 2 min. What fraction of a sample of O-15 will remain after 5 half- lives?

Q: Find the initial amount of a radioactive element with a half-life of 21.7 hours, when the remaining…

A:

Q: Calculate how long it will take for a sample of 234TH with a half-life of 24.1 days to decay to 6.0%…

A: We are given that half life is about 24.1 days, and sample decays to 6% of its original value . We…

Q: The half-life of element X is 500 years. If there are initially 8 g of X, how much will remain after…

A:

Q: The half-life of radioactive chromium-51 is 28 days, If a sample of chromium-51 has a mass of 12.0…

A:

Q: The half life of 15O is 122 seconds. If you start with a sample of 400g how long will it take to end…

A: Radioactive decay follows first-order kinetics. Hence, the integrated rate law for the radioactive…

Q: technetium-99 has a half-life of 6.0 hours. How many gramsin a 24.0 gram sample will remain…

A:

Q: Cesium – 137 has a half life of 30 years. How much of a 100 mg sample is left after 120 years?

A: A numerical problem based on half-life period, which is to be accomplished.

Q: Cobalt-60 has a half-life of 5.3 years. How many half-livesoccur after 21.2 years?

A: Generally, a radioactive decay reaction takes place as a first order reaction.  In a first order…

Q: 7. If we start with 1.000 g of strontium-90, 0.953 g will remain after 2 years. (a) What is the…

A: Reladioactive decay reactions are first order reactions which can be solved as follows using…

Q: The half-life of a radioactive element is 1,250 years.What percent of the atoms remain after 5,000…

A: Number of half lives = 50001250 = 4 100%  →1250 years 50%  →1250 years 25% →1250 years 12.5 % →1250…

Q: Radioactive Decay The half-life of palladium-100 is 4 days. After 20 days a sample has been reduced…

A: Given Data:  Half life of Pd-100 = 4 days  Reduced mass = 0.375g The formula of half life is given…

Q: What is the half-life of an element that begins with 100g, and 18.8g remains after 113 minutes.

A: Half life of radioactive element-is the time needed for given number of its nuclei to decay exactly…

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: 8. How long will it take for a sample of plutonium -239 with a half-life of 24000 years to decay to…

A: Given information : plutonium-239 Half life (t1/2) = 24,000 years Initial amount = Ao Final amount…

Q: How long will it take for 50% of a sample of ³'I to decay?

A:

Q: A to 240mg sample of technetium 99M is used for a diagnostic test. if Technetium -99m has a…

A:

Q: Question: The half-life of a radioactive element is 50 minutes. How long will it take the mass of…

A: Introduction It should be remembered that the order of radioactive decay always remains equivalent…

Q: The half life of radium -226 is 1590yrs . If a sample contains 400mg, how many mg will remain after…

A: Given;

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: If half-life of carbon-14 is 5730 years, estimate the age of a bone containing 75% of its original…

A:

Q: The half-life of radioactive chromium-51 is 28 days. If a sample of chromium-51 has a mass of 12.0…

A: Given, Half Life , t1/2 = 28 days First, calculate rate constant ,K to calculate time (t)

Q: Cobalt-60 is a beta-emitter used in radiation cancer treatment equipment in hospitals. What total…

A: Given Initial mass = 24 g half life = 5.33 years time = 16 years

Q: Iodine-131 is administered orally in the form of Nal(aq) as a treatment for thyroid cancer. The…

A: We know, radioactivity is an example of first-order reaction.

Q: How long does it take for 105 mg of tritium H to decay to 35.0 mg? The half-life of tritium is 12.3…

A: All radioactive decays are first order reaction.

Q: The half life of 52Fe is 8.28 hours. Suppose we measure the activity of a sample containing 52Fe and…

A: Calculation of disintegration constant (λ):T1/2 of 52Fe is = 8.28 hours.

Q: The half-life of Palladium-100 is 4 days. After 24 days a sample of Palladium-100 has been reduced…

A: N  = N0 e-λt  N0  = Initial mass of the sample N = Mass of the sample after a time 't' λ = decay…

Q: II 24 Iours, what is the half-life of Ra-226 in years? 27 3. Arsenic - 70 has a half life of 140…

A: As per our guidelines we can only solve first question. Please resubmit the other questions as next…

Q: The half-life of a radioactive element is 8 days. How long will it a 1.0 g sample to decay to 0.0625…

A: Radioactive decay is the process of breakdown of radioactive matter. The atomic nucleus is broken…

Q: The half life of 123I is 13 hr.  How much of a 64 mg sample of 123I is left after 26 hours?

A: Given,Half life of 123I is 13 hr

Q: alf-life of a radioactive substance is 3.8 hrs. After how many hours 30% of its original value…

A:

Q: How old in years is a bottle of a solution if the deuterium 2H content is 67% that of a new wine?…

A: Radioactive decay follow first order kinectics    Half life = 100 years

Q: Directions: Solve the following problems carefully. Write your detailed solutions on another sheet…

A:

Q: The half-life of a radioactive element is 6 months. The time taken to reduce its original…

A: Given  Half life of radioactive element ( t1/2 )  = 6 month  Remaining Concentration ( At ) = 116…

Q: An unknown radioactive element decays into non-radioactive substances. In 340 days the radioactivity…

A:

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

A:

Q: The half-life of Palladium-100 is 4 days. After 20 days a sample of Palladium-100 has been reduced…

A:

Q: E Reae The half life of chromium-51 is 27.8 days. How many days are required for 15/16 of a sample…

A: Chemical Kinetics  1st order Kinetics  Nuclear Decay  Step-2 Has further calculation

Q: What is the half-life of Californium- 252 based on the graph below?

A:

Q: A substance X initially weights 56 grams. After 6 minutes, it was observed that its mass decreased…

A: Mass at starting (t=0) = 56 grams Mass after 6 min = (56-12) g                                = 44 g…

Q: Strontium-82 has a half-life of 25.5 days. If you start with 100.0 g on January 1st 2018,…

A: Strontium-82 has a half-life of 25.5 days. If you start with 100.0 g on January 1st 2018, the amount…

Q: Stonehenge is an ancient megalithic site in southern England. Some believe it was designed to make…

A: Given: Sample=6 pound Carbon-14=0.33 Pounds t12=8333 years To find: Age of charcoal pits Solution:…

Q: The half-life of Po-214 is 0.001 seconds. How much of a 10 gram sample is left after 0.003 seconds?…

A: We know radioactive decay follows first order reaction kinetics, therefore  t1/2=0.001 s and…

Q: 3. Suppose a sample of carbon-243 has a half-life of 3427 years. How long does it take for 80% of a…

A: In this question, we have to find out the correct answer of given problem by the help of the…

Q: decay

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

Q: The half life of radium-226 is 1600 years. How many grams of a 0.25g sample will remain after 4800…

A: After decying the nucleus it emits radiation of electromagnetic rays ,of certain Wavelength.

Q: The half-life of 232Th is 1.4 x 10" yr. Find the number of disintegrations per hour emitted by 1.0…

A:

Q: Americium-241 is widely used in smoke detectors. Calculate the amount of americium-241 consumed in a…

A:

Q: It takes 6400 years for one gram of a radioactive element to decay away to only 1/16 of a gram. The…

A: Given time = 6400 years M/M० = 1/16

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.