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What fraction of a radium sample will remain after 3240?
The answer depends on 3240 WHAT: seconds, days, years?
Why is it not practical to have a macroscopic sample that is 100 percent pure?
because
If 57 mg of radium 221 has a half life of 30 seconds. How long will it take for 95 percent of the sample to decompose?
try using my formula.... ar=a(1/2)^2t therefore, 57(.05) = 57(1/2)^2t and 57s cancels out, .05 = 1/2^2t log .05 = log .5^2t divide log .5 from both sides, 4.32 = 2t t = 2.16, therefore 126 seconds or 2 minutes and 6 seconds
The movie rating website rotten tomatoes reported that 92 percent of a sample of 39 movie critics hated the 2005 horror movie the fog is the 92 percent statistic or parameter?
parameter !
You decide to select ten percent of the inmates in a prison to receive a survey You decide you want your sample to be representative of the population What procedure would provide the most represent?
Select the sample so that it will have the same percentages of people that are men and women as are in the system, and also match the percentage based on educational background and ethnicity
What fraction of a sample of N 16 remains undecayed after 43.2 seconds?
1.5% remains after 43.2 seconds.
What is the fraction of a sample of tritium that remains undecayed after fifty years?
After 50 years, approximately 50% of tritium will remain undecayed in a sample. Tritium has a half-life of about 12.3 years, which means that the amount of undecayed tritium decreases by half every 12.3 years.
What fraction of an original 20.00gram sample of nitrogen-16 remains unchanged after 36.0 seconds?
2
How many undecayed M and Ms would remain out of a sample of 600 M and Ms after three half lives?
75
Which fraction of an original 20.00-gram sample of nitrogen-16 remains unchanged after 36.0 seconds?
Nitrogen-16 has a half-life of about 7.13 seconds. After 36.0 seconds, there would be 3 half-lives. Therefore, 1/2 * 1/2 * 1/2 = 1/8 of the original sample remains unchanged.
After one half-life what percent of the original uranium remains?
After one half-life, 50% (or half) of the original uranium remains.
What fraction of a sample remains after three half lives?
An eighth remains.
What is the significance of a half life of a radioisotope?
It tells what fraction of a radioactive sample remains after a certain length of time.
What is the percent composition of NaHCO3 in a given sample?
To find the percent composition of NaHCO3 in a sample, you would calculate the mass of NaHCO3 in the sample divided by the total mass of the sample, then multiply by 100 to get the percentage.
What happens to the mass of a radioactive isotope as it decays?
The mass of a radioactive isotope remains constant as it decays. However, the atomic nucleus can change due to the emissions of particles or energy, which can result in the isotope transforming into a different element.
After three half-lives what fraction of a radioactive sample remains?
1/8 of the original amount remains.
How to find the percent by mass of a compound in a given sample?
To find the percent by mass of a compound in a given sample, you need to divide the mass of the compound by the total mass of the sample and then multiply by 100. This will give you the percentage of the compound in the sample.
