0
1/24 = 1/16
Wiki User
∙ 11y ago
Add your answer:
Earn +20 pts
The half of iodine-125 is 60 days.What fraction of iodine-125 nuclides would be left after 360 days?
Assuming that "half" refers to "half-life", 360/60 = 6 so fraction left = 1/26 = 1/64
A rope is cut in half and half is discarded From the remaining half 1 quarter is cut off and discarded What fraction of the original rope is left?
3/8
How much Cu-61 (half-life about 3 hours) would remain from 2 mg sample after 6 hours?
6 hours = 2 half lives, thus 25 % would remain. 0.25 x 2 mg = 0.5 mg.Done another way...fraction remaining = 0.5^n where n = number of half lives = 6hr/3hr = 2fraction remaining = 0.5^2 = 0.250.25 x 2 mg = 0.5 mg
What fraction of U-238 atoms present at 1 half-life remain after 2 half-lives?
1/2 (50%) of them.
What is 0.62 and a half as a fraction?
0.62 and a half as a fraction is 5/8.
How long will it take for a 12.0-g sample of iodine-131 to decay to leave a total of 1.50 g of the isotope The half-life of iodine-131 is 8.07 days?
half life is 8.1 days, so it takes 8.1 days for half the iodine sample to decay. It takes another 8.1 days for half of the remaining sample (ie. 1/4th of the original sample) to decay. So it takes 16.2 days for 3/4th of the sample to decay.
What fraction of a radioisotope is remaining if it undergoes six half-lives?
1 / 26 = 1 / 64.
How much hydrogen-3 will remain after 60 years if the original sample have a mass 80.0 g and a the half-life of hydrogen-3 is 12 years?
Fraction remaining = 0.5^n where n = # of half lives that have elapsed60 yrs x 1 half life/12 yrs = 5 half lives have elapsed Fraction remaining = 0.5^5 = 0.03125 mass remaining = 0.03125 x 80.0 g = 2.5 g remaining
After three half-lives what percent of the radioactive isotope is remaining?
12.5% is remaining.
The half of iodine-125 is 60 days.What fraction of iodine-125 nuclides would be left after 360 days?
Assuming that "half" refers to "half-life", 360/60 = 6 so fraction left = 1/26 = 1/64
After three half lives what fraction of the daughter product has formed?
91.16% of the daughter product has formed after 3.5 half lives.
What fraction of chlorine 36 remains undecayed after 2000000 years?
the half-life of chlorine 36 is 400,000 years. 200,000 years is 1/2 of a half life. in general, the formula to calculate the fraction of remaining amount is 1/2^n, where n represents the number of half-lives that have passed. in this case, n=1/2, or 0.5, therefore the remaining fraction is 1/2^0.5. Use your calculator and you will find that this is 0.707, or about 71% of the original amount. hope this helps
Why After three half-lives what fraction of a radioactive sample remains?
The fraction that remains is 1/8.
What fraction of a sample remains after three half lives?
An eighth remains.
A rope is cut in half and half is discarded From the remaining half 1 quarter is cut off and discarded What fraction of the original rope is left?
3/8
How much of an 80-milligram sample of Iodine-131 would be left after 32 days?
Iodine 131 is radioactive and has a half life of about 8 days. After 32 days there would be approximately 5 milligrams remaining
How much Cu-61 (half-life about 3 hours) would remain from 2 mg sample after 6 hours?
6 hours = 2 half lives, thus 25 % would remain. 0.25 x 2 mg = 0.5 mg.Done another way...fraction remaining = 0.5^n where n = number of half lives = 6hr/3hr = 2fraction remaining = 0.5^2 = 0.250.25 x 2 mg = 0.5 mg
