The half life of Unobtainium 280 is 15 minutes. If I have 1600 grams of Unbtainium 280 to begin with, how many minutes will elapse such that I have 25 grams of it left?

Q: a. A 100.0 nanogram (ng) sample of sodium-24 was stored in a lead-lined cabinet for 2.5 d. How…

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Q: If a sample of 131La goes from 450 picocuries to 100 picocuries in 185 minutes, what is its…

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

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Q: As recently as the late 1970s, some wrist watches were manufactured using tritium (3H) as a…

A: t1/2 of 3H = 4500 days 43 years ago, a watch was purchased.

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

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Q: This is more of an Astronomy question but Assume the half life of some radioactive element is 100…

A: half life of a reaction is defined as final concentration is the half of the initial concentration…

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: How much of a 24 g sample of radium 226 will remain unchanged at the end of 3 half-life periods?

A: Given,  Mass of the sample of radium 226 = 24 g  Mass of the sample of radium 226 remain unchanged…

Q: 21. Barium – 122 has a half-life of 2 minutes. Suppose you obtain a sample weighing 10.0 g and it…

A: 21. Given that: Half life of Barium-122 = 2 mins. Time taken for the set up = 10 mins

Q: A particular isòtope of an element has a half-life of 75.0 hours. What percentage of the sample will…

A: All isotopic decomposition follows the first order reaction kinetics. So using integrated rate…

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

A: The objective of the question is to calculate the amount of Americium-241 consumed in a smoke…

Q: Technetium-99 (half-life = 6.0 h) is used in medical imaging. How many half-lives would go by in 18…

A: technetium - 99 have half life = 6 hours

Q: A pure carbon archaeological artefact has an age of 24661 years and emits 8 electrons per minute.…

A: This problem is based on nuclear chemistry and it covers the subtopic radiocarbon dating. The…

Q: Sodium-24 is used to treat leukemia and has a half-life of 15 hours. A patient was injected with a…

A: Radioactive disintegration  is very unstable nucleus loosing energy  and it follows first order

Q: Potassium 40 has a half life of 1.3 billion years.  If no half lives had passed, what percentage of…

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

Q: The half life of a radioactive iodine is 8 days. How long will it take for 0.25 g of radioactive…

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Q: Thallium-201 is used medically to diagnose heart problems. The half-life of thallium-201 is 72.9…

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

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Q: The half life of 21 At is 7.214 hours. What fraction of a sample of21At will remain after 3.141…

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

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

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Q: Potassium ion is present in foods and is an essential nutrient in the human body. One of the…

A: 40-K , undergoes decay by three modes : 1. Positron emission ( it is emission of beta+ particle),…

Q: The half-life of In-111 is about 3 days. If only 12.5% of the original sample remains, the time…

A: Given  Remaining Amount [ A ]t = 12.5 %  Let initial Amount [ A ]0    = 100%  Half life ( t1/2 )…

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

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Q: Radiation seed therapy is a common method for treating some prostate cancers and brain tumors.…

A: Radioactive degradation follow first order kinetics.

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

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Q: A 120-mg sample of technetium-99m is used for a diagnostic test. If technetium-99m has a half-life…

A: The basic formula for half life equations is A= amount remainingP= original amountt= elapsed…

Q: The​ half-life of​ silicon-32 is 710 years. If 20 grams is present​ now, how much will be present…

A: Radioactive decay is always a first order reaction. The rate equation for the radioactive decay is :…

Q: How much time is required to reduce a 1 kg sample to about 1 gram if the half life of cesium-137 is…

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