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How long does it take a 100 g sample of au-1 98 to decay to 6.25?
Wiki User
∙ 12y ago
The half-life of gold-198 is approximately 2.7 days.
The decay constant k, is 0.693/(half-life in days) or 0.2567 d-1 to use in the radio active decay equation:
log10(Xo/X) = k*t/2.30, where Xo is the amount initially & X is the amount after time, t. So substitute & solve for t:
log (100/6.25) = (0.2567*t)/2.30
t = 10.8 days
Wiki User
∙ 12y ago
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Carbon-14 has a half-life of 5730 years. how long does it take a 200-gram sample of carbon-14 decay to a mass of 100 grams?
5,730 years
How long does it take a battery to decay?
It takes 100 years for a battery to decompose.
How old in years is a fossil sample that has 12.5 percent C-14?
The half-life of Carbon-14 is 5,730 years. As such for the carbon-14 to decay from 100% to 12.5% it would take three times the half-life of the material.100% (1st half life decay period) 50% (2nd half life decay period) 25% (3rd half life decay period) 12.5%.Therefore = 5730 x 3 = 17,190 years.
How long does it take for 75 of an original 100 silver atoms to decay?
The decay rate of atoms is typically quantified by a half-life, which is the time it takes for half of the original atoms to decay. If we assume a constant decay rate, we can estimate that it takes approximately 3 half-lives for 75 of the original 100 silver atoms to decay. If the half-life of the silver isotope is 1 hour, then it would take approximately 3 hours for 75 of the atoms to decay.
How do you find the percent of something in a sample?
it is a simple task (something/total of sample)*100 ex: to find % of your marks obtained 589/600*100= 98.16666=98%
How long does it take a 100 gram sample of uranium 235 to decay to a mass of 50 gram?
700 million years
Carbon-14 has a half-life of 5730 years. how long does it take a 200-gram sample of carbon-14 decay to a mass of 100 grams?
5,730 years
Carbon-14 has a half-life of 5730 years. How long does it take a 200-gram sample of carbon-14 to decay to a mass of 100 grams?
5,730 years
Uranium-235 has a half-life of 700 million years. how long does it take a 100-gram sample of uranium-235 to decay to a mass of 50 grams?
700 million (more exactly 703,8.106) years
How much of an 800-gram sample of potassium-40 will remain after 3.9109 years of radioactive decay?
100 grams
How long does it take a battery to decay?
It takes 100 years for a battery to decompose.
When A carbon-14 sample starts with 100 atoms and 5730 years later there are 50 atoms. What is the half-life of carbon-14?
The half-life of carbon-14 is 5 730 years.
How much of an 800-gram sample of potassium-40 will remain after 3.9 X 109 years of radioactive decay?
100 grams
How old in years is a fossil sample that has 12.5 percent C-14?
The half-life of Carbon-14 is 5,730 years. As such for the carbon-14 to decay from 100% to 12.5% it would take three times the half-life of the material.100% (1st half life decay period) 50% (2nd half life decay period) 25% (3rd half life decay period) 12.5%.Therefore = 5730 x 3 = 17,190 years.
Is there any way aluminum is bad?
Aluminum takes more than 100 years to decay. If this were to be thrown in the garbage, it would take up to 100 years completely decay.
How long does it take for 75 of an original 100 silver atoms to decay?
The decay rate of atoms is typically quantified by a half-life, which is the time it takes for half of the original atoms to decay. If we assume a constant decay rate, we can estimate that it takes approximately 3 half-lives for 75 of the original 100 silver atoms to decay. If the half-life of the silver isotope is 1 hour, then it would take approximately 3 hours for 75 of the atoms to decay.
A carbon-14 sample starts with 100 atoms and 5730 years later there are 50 atoms. What is the half-life of carbon-14?
The half-life is 5730. This is because the half-life is the amount of time it takes for half of a sample to decay. In this case, the sample is 100 atoms, and half of 100 is 50, so the amount of time it takes the sample to reach 50 atoms is it's half life...5730!
