Suppose you start with a sample with 2.900×108 nuclei of a particular isotope. This isotope has...
Suppose you start with a sample with 2.900×108 nuclei
of a particular isotope. This isotope has a half-life of 374
s.
a) What is the decay constant for this particular isotope?
b) How many nuclei remain after 797 s?
c) What is the activity of the sample at the beginning of the experiment?
Homework Answers
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Suppose you start with a sample with 2.900×108 nuclei
of a particular isotope. This isotope has...
Please help. I figured out the first part but don't know the second part. Suppose you...
Please help. I figured out the first part but don't know the second part. Suppose you start with a sample with 4.150×108 nuclei of a particular isotope. This isotope has a half-life of 446 s. What is the decay constant for this particular isotope? How many nuclei remain after 1.13×103 s?
A freshly prepared sample of a certain radioactive isotope has an activity of 10.0 mCi. After...
A freshly prepared sample of a certain radioactive isotope has an activity of 10.0 mCi. After 3.80 h, the activity is 8.30 mCi. (a) Find the decay constant and half-life of the isotope. (b) How many atoms of the isotope were contained in the freshly prepared sample? (c) What is the sample's activity 30 h after it is prepared?
A freshly prepared sample of a radioactive isotope has an activity of 27.5 mCi. After 2.60...
A freshly prepared sample of a radioactive isotope has an activity of 27.5 mCi. After 2.60 hours, the activity is 21.0 mCi. (a) Determine the half-life of the isotope. (h) (b) How many nuclei of the isotope were contained in the freshly prepared sample? (nuclei) (c) After how much time will the activity be 1.40 mCi? (h)
The half-life of 52Mn is 5.59 days. (a) Convert the half-life to units of seconds. (b)...
The half-life of 52Mn is 5.59 days. (a) Convert the half-life to units of seconds. (b) What is the decay constant (in s−1) for this isotope? (c) Suppose a sample of 52Mn has an activity of 0.510 µCi. What is this activity expressed in the SI unit of becquerels (Bq)? (d) How many 52Mn nuclei are needed in the sample in part (c) to have the activity of 0.510 µCi? E. Now suppose that a new sample of 52Mn has...
1. a certain isotope has a half life of 24.3 minutes. what is the decay constant...
1. a certain isotope has a half life of 24.3 minutes. what is the decay constant (in s^-1) of this isotope? 2. You are told that a room contains an isotope with a half-life of 1.5 hours. If you need to wait until the isotope has decayed to 15% of its initial activity before entering the room, how long (in hours) must you wait
At the beginning of an experiment, a scientist has 108 grams of radioactive goo. After 240...
At the beginning of an experiment, a scientist has 108 grams of radioactive goo. After 240 minutes, her sample has decayed to 3.375 grams. What is the half-life of the goo in minutes? Preview How many grams of goo will remain after 99 minutes? Preview How many grams of goo will remain after 218 minutes? Preview Round your answers to the nearest tenth as needed. Get help: Video Drintendent
If you start with a 30 g sample of I-131, how many grams of I-131 would...
If you start with a 30 g sample of I-131, how many grams of I-131 would there be after 16 days? The half-life of I-131 is 8.02 days. Th-232 undergoes decay by emitting the following particles: alpha, beta, beta, alpha, alpha, alpha, alpha, beta, beta, alpha. What is the resulting isotope? Write out the entire decay series.
1. The half-life of an isotope of phosphorus is 14.2 days. If a sample contains 3.96e16...
1. The half-life of an isotope of phosphorus is 14.2 days. If a sample contains 3.96e16 such nuclei, determine its activity.? 2. A 234-mCi sample of a radioactive isotope is purchased by a medical supply house. If the sample has a half-life of 17.4 days, how long will it keep before its activity is reduced to 28.9 mCi?
please note that the answer is not 2.4*10^14. please show your work clearly thank you, i'll...
please note that the answer is not
2.4*10^14. please show your work clearly thank you, i'll upvote
6. The radioactive isotope (183 Ta) has a half-life of 5.11 days. A sample containing this isotope has an initial activity at (t = 0) of 4.50 x 108 Bq. Calculate the number of nuclei that will decay in the time interval between tı = 36.0 hours and t2 = 70.0 hours. x 2.4e14 nuclei
If you start with 16 million nuclei of a radioisotope with a half life of 10...
If you start with 16 million nuclei of a radioisotope with a half life of 10 minutes, how many will be left after 110 minutes?
At the beginning of an experiment, a scientist has 108 grams of radioactive goo. After 240 minutes, her sample has decayed to 3.375 grams. What is the half-life of the goo in minutes? Preview How many grams of goo will remain after 99 minutes? Preview How many grams of goo will remain after 218 minutes? Preview Round your answers to the nearest tenth as needed. Get help: Video Drintendent
please note that the answer is not
2.4*10^14. please show your work clearly thank you, i'll upvote
6. The radioactive isotope (183 Ta) has a half-life of 5.11 days. A sample containing this isotope has an initial activity at (t = 0) of 4.50 x 108 Bq. Calculate the number of nuclei that will decay in the time interval between tı = 36.0 hours and t2 = 70.0 hours. x 2.4e14 nuclei
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