The half life of Zn -71 is 1.2 minutes. If you had a 120.0 g of...
The half life of Zn -71 is 1.2 minutes. If you had a 120.0 g of this material before any radioactive decay, how many grams would be left after 4.8 minutes have elapsed?
Homework Answers
The half-life of Zn-71 is 2.5 minutes. If one had 100.0 g at the beginning, how...
The half-life of Zn-71 is 2.5 minutes. If one had 100.0 g at the beginning, how many grams would be left after 7.5 minutes has elapsed? Please show work.
(9 points) a. The half-life of a radioisotope is 2.4 minutes. If you had 100 grams...
(9 points) a. The half-life of a radioisotope is 2.4 minutes. If you had 100 grams at the beginning, how many grams would be left after 7.2 minutes has elapsed?
The half-life for the radioactive decay of iron-55 is 2.7 years. From a 2.00 g sample...
The half-life for the radioactive decay of iron-55 is 2.7 years. From a 2.00 g sample of iron – 55, how many grams will be left after 13.5 years?
224. You have 83.525g of a radioactive element with a half-life of 52.01minutes. After 254.3 minutes...
224. You have 83.525g of a radioactive element with a half-life of 52.01minutes. After 254.3 minutes have passed, how many grams of the radioactive element remain? Report your answer to 2 decimal places.
a radioactive material has a half life of 7 days. how many radioactive isotopes are left...
a
radioactive material has a half life of 7 days. how many
radioactive isotopes are left after 33 hours, if you had 7000000
isotopes in the beginning?
Question 33 1 pts A radioactive material has a half life of 7 days. How many radioactive isotopes are left after 33 hours, if you had 7 000 000 isotopes in the beginning? Use 2 sig figs in your answer. < Previous Next >
8. Fermium-253 has a half-life of 0.334 seconds. A radioactive sample is considered to be completely...
8. Fermium-253 has a half-life of 0.334 seconds. A radioactive sample is considered to be completely decayed after 10 half-lives. How much time will elapse for this sample to be considered gone? 9. 100.0 grams of an isotope with a half-life of 36.0 hours is present initially. How ma time will have elapsed when 5.00 grams remains? 131 (half-life = 8.040 days) to decay to 10. How long will it take for a 40.0 gram sample of 1-131 (half-life =...
The following question is about the fundamental forces. 13. List the four force interactions in the...
The
following question is about the fundamental forces.
13. List the four force interactions in the universe (in order
from strongest to weakest)
The decay curve of a radioactive nuclide sample is shown. It’s
initial activity Is measured to be X Bq.
14. What is the population at t=8.0 hours?
15. After how many half lives will the population be 125
nuclides
16. What will be the level of activity (in terms of X) after
two half lives have elapsed?...
The radioactive isotope, Fr - 223, has a half-life of 22 minutes. How many minutes will...
The radioactive isotope, Fr - 223, has a half-life of 22 minutes. How many minutes will it take for an original sample to decay to 12.5% of its original amount? Express your answer in minutes. Enter only the numeric value of the answer without the units.
Answers for questions 13-23 please. The following question is about the fundamental forces 13. List the...
Answers for questions 13-23 please.
The following question is about the fundamental forces 13. List the four force interactions in the universe (in order from strongest to weakest) together with their associated particles The decay curve of a radioactive nuclide sample is shown. Its initial activity is measured to be X 6q 14. What is the population at t8.0 hours?14. 15. After how many half lives will the 0 population be 125 nuclides? 15. 16. What will be the level...
A scientist begins with 250 grams of a radioactive substance. After 250 minutes, the sample has...
A scientist begins with 250 grams of a radioactive substance. After 250 minutes, the sample has decayed to 36 grams. Write an exponential equation f(t) representing this situation. (Let f be the amount of radioactive substance in grams and t be the time in minutes.) f(t) 250e 0.0087t x To the nearest minute, what is the half-life of this substance? 89 min Use the model for continuous exponential decay, y = Ao e-kt, where y is the amount of radioactive...
(9 points) a. The half-life of a radioisotope is 2.4 minutes. If you had 100 grams at the beginning, how many grams would be left after 7.2 minutes has elapsed?
a
radioactive material has a half life of 7 days. how many
radioactive isotopes are left after 33 hours, if you had 7000000
isotopes in the beginning?
Question 33 1 pts A radioactive material has a half life of 7 days. How many radioactive isotopes are left after 33 hours, if you had 7 000 000 isotopes in the beginning? Use 2 sig figs in your answer. < Previous Next >
8. Fermium-253 has a half-life of 0.334 seconds. A radioactive sample is considered to be completely decayed after 10 half-lives. How much time will elapse for this sample to be considered gone? 9. 100.0 grams of an isotope with a half-life of 36.0 hours is present initially. How ma time will have elapsed when 5.00 grams remains? 131 (half-life = 8.040 days) to decay to 10. How long will it take for a 40.0 gram sample of 1-131 (half-life =...
The
following question is about the fundamental forces.
13. List the four force interactions in the universe (in order
from strongest to weakest)
The decay curve of a radioactive nuclide sample is shown. It’s
initial activity Is measured to be X Bq.
14. What is the population at t=8.0 hours?
15. After how many half lives will the population be 125
nuclides
16. What will be the level of activity (in terms of X) after
two half lives have elapsed?...
The radioactive isotope, Fr - 223, has a half-life of 22 minutes. How many minutes will it take for an original sample to decay to 12.5% of its original amount? Express your answer in minutes. Enter only the numeric value of the answer without the units.
Answers for questions 13-23 please.
The following question is about the fundamental forces 13. List the four force interactions in the universe (in order from strongest to weakest) together with their associated particles The decay curve of a radioactive nuclide sample is shown. Its initial activity is measured to be X 6q 14. What is the population at t8.0 hours?14. 15. After how many half lives will the 0 population be 125 nuclides? 15. 16. What will be the level...
A scientist begins with 250 grams of a radioactive substance. After 250 minutes, the sample has decayed to 36 grams. Write an exponential equation f(t) representing this situation. (Let f be the amount of radioactive substance in grams and t be the time in minutes.) f(t) 250e 0.0087t x To the nearest minute, what is the half-life of this substance? 89 min Use the model for continuous exponential decay, y = Ao e-kt, where y is the amount of radioactive...
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