Carbon 11 is a radioactive element with a half-life of 20.3 minutes. A sample initially contains 1E7 atoms of Carbon 11. How many of those will be left after 285 minutes? Keep four significant digits.

Q: Indium-116 is radioactive and has a half-life of 14.10 seconds. How much of a 9.10 mg sample would…

A:

Q: Strontium-90 is radioactive and has a half life of 28.8 years. How much of a 5.20 mg sample would be…

A: Given: Half life=28.8 years Time=127 years Initial concentration=5.20mg Since it is radioactive…

Q: Be sure to answer all parts. The radioactive decay of thallium-206 to lead-206 has a half-life of…

A: Here we have to calculate number of atom left after 42 minutes-

Q: Iodine- 131 is radioactive and has a half life of 8.04 days. What percentage of a sample would be…

A: Given,half life of Iodine-131 = 8.04 daystime taken for decay = 3.26 days.

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

A: Solution -

Q: Tin-129 is radioactive and has a half life of 2.23 minutes. What percentage of a sample would be…

A: Answer:

Q: Iodine-125 is radioactive and has a half life of 60.25 days. How much of a 7.20 mg sample would be…

A: The solution is as follows :

Q: 5. Carbon-14 is a radioactive substance produced in the Earth's atmosphere and then absorbed by…

A: The given equation for exponential decay is: N=N0e-λt

Q: A scientist discovers a new isotope, exponentialitium. The scientist sets aside 150 grams of…

A: We have to calculate the half life.

Q: You just started a new job and a fellow researcher found a fossil that they believed to be 20,000…

A: Given: Half-life of the new isotope = 2000 years. And the actual age = 4000 years.

Q: Bromine-88 is radioactive and has a half life of 16.3 seconds. What percentage of a sample would be…

A: t(1/2) = 16.3 secondst = 31.6 secondsA0 = 100% as the initial percentage of a sampleA =?

Q: Strontium-90 is radioactive and has a half life of 28.8 years. How long would it take a sample to…

A:

Q: Hydrogen-3 is radioactive and has a half life of 12.3 years. What percentage of a sample would be…

A: Half life (t1/2) = 12.3 years Time (t) = 39.1 years Percentage of sample would be left after 39.1…

Q: Radium-226 is radioactive and has a half life of 1600. years. What percentage of a sample would be…

A: This problem is based on Nuclear Chemistry which is a subtopic of Chemical Kinetics.Here,…

Q: Strontium-90 is radioactive and has a half life of 28.8 years. How much of a 9.70 mg sample would be…

A:

Q: Krypton consists of several radioactive isotopes, some of which are listed in the following table.…

A:

Q: Tin-129 is radioactive and has a half life of 2.23 minutes. How much of a 3.00 mg sample would be…

A: We have to predict the amount of sample left

Q: Radium-226 is radioactive and has a half life of 1600. years. How long would it take a sample to…

A: The emission of energy in the form of the ionizing radiation is called radio decay.This radiation…

Q: Iodine-131 is radioactive and has a half life of 8.04 days. How much of a 8.90mg sample would be…

A: Half life tells you about the intervals when your initial sample will get halved.

Q: 100- Using the graph to the right, answer the following questions. 90- 80- 4. What is the half-life…

A:

Q: Phosphorus-32 has a half-life of 14.0 days. Starting with 4.00 g of 32P, how many grams will remain…

A: Question is about the radioactive element phosphorus-32 . If half life of P-32 is 14 days. We have…

Q: Radium-226 is radioactive and has a half life of 1600. years. What percentage of a sample would be…

A:

Q: Cesium-137 is radioactive and has a half life of 30. years. How much of a 8.10 mg sample would be…

A:

Q: Indium-116 is radioactive and has a half life of 14.10 seconds.

A:

Q: 203.) The naturally occurring isotope rubidium-87 decays by beta emission to strontium-87. This…

A:

Q: Cobalt-60 is radioactive and has a half life of 5.26 years. What percentage of a sample would be…

A: For the reaction - A   +     B      →      C     +      D Rate = KAnBm where n and m are order of A…

Q: Describe an alpha particle. What nucleus is it equivalent to? •    Describe a beta particle. What…

A:

Q: It is believed that two carbon-12 nuclei can react in the core of a supergiant star to form…

A: Two carbon-12 nuclei reacts with each other to form sodium-23 and hydrogen-1 .  We have to calculate…

Q: Indium-116 is radioactive and has a half life of 14.10 seconds. What percentage of a sample would be…

A: Given, Half life (t1/2) of radioactive Indium-116 = 14.10 s % of a sample would be left after = 29.4…

Q: Iodine-125 is radioactive and has a half life of 60.25 days. How much of a 8.10 mg sample would be…

A: Radioactive decay of Iodine-125 Half life (t1/2) = 60.25 days Initial amount of the sample = (I)0 =…

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: Phosphorus- 32 is radioactive and has a half life of 14.3 days. How much of a 2.70mg sample…

A: The rate constant for the reaction, k, is calculated as shown below where t1/2 is the half-life for…

Q: Iodine-131 is radioactive and has a half life of 8.04 days. What percentage of a sample would be…

A: Given is radioactive element  Iodine-131.Half life= 8.04 days.Time= 30.9 days

Q: Tin-129 is radioactive and has a half life of 2.23 minutes. What percentage of a sample would be…

A:

Q: Iodine-125 is radioactive and has a half life of 60.25 days. How much of a 6.70 mg sample would be…

A:

Q: Phosphorus-32 is radioactive and has a half life of 14.3 days. What percentage of a sample would be…

A:

Q: Cobalt-60 is radioactive and has a half life of 5.26 years. What percentage of a sample would be…

A: Radioactive decay follow first order kinetics  × t =   = decay constant t = time t1/2 = half lifeN0…