Indium-116 is radioactive and has a half life of 14.10 seconds. What percentage of a sample would be left after 37.3 seconds?Round your answer to 2 significant digits.
Question
Indium-116 is radioactive and has a half life of 14.10 seconds. What percentage of a sample would be left after 37.3 seconds?Round your answer to 2 significant digits.
Solution
To solve this problem, we need to use the formula for exponential decay which is N = N0 * (1/2)^(t/T), where:
N is the final amount of the substance, N0 is the initial amount of the substance, t is the time that has passed, and T is the half-life of the substance.
In this case, we want to find N/N0, the fraction of the substance that remains after time t. We know that t = 37.3 seconds and T = 14.10 seconds.
So, we can substitute these values into the formula:
N/N0 = (1/2)^(37.3/14.1)
Calculating the exponent first:
37.3/14.1 = 2.645
Then, calculate the base to the power of the exponent:
(1/2)^2.645 = 0.208
To express this as a percentage, we multiply by 100:
0.208 * 100 = 20.8%
So, approximately 20.8% of the Indium-116 sample would be left after 37.3 seconds.
Similar Questions
Radium-226 is radioactive and has a half life of 1600. years. What percentage of a sample would be left after ×7.57103 years?Round your answer to 2 significant digits.
Strontium-90 is radioactive and has a half life of 28.8 years. What percentage of a sample would be left after 108. years?Round your answer to 2 significant digits.
Tin-129 is radioactive and has a half life of 2.23 minutes. What percentage of a sample would be left after 10.6 minutes?Round your answer to 2 significant digits.
Indium-116 is radioactive and has a half life of 14.10 seconds. Calculate the activity of a 2.7mg sample of indium-116. Give your answer in becquerels and in curies. Be sure your answer has the correct number of significant digits.BqCi
Bromine-88 is radioactive and has a half life of 16.3 seconds. What percentage of a sample would be left after 1.74 seconds?Round your answer to 2 significant digits.
Upgrade your grade with Knowee
Get personalized homework help. Review tough concepts in more detail, or go deeper into your topic by exploring other relevant questions.