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How much phosphorus-32 remains from a 6.00 g sample after each of the following number of...
How much phosphorus−32 remains from a 3.00 g sample after each of the following number of...
How much phosphorus−32 remains from a 3.00 g sample after each of the following number of half-lives: (a) 2; (b) 8?
18 3 attempts left Check my work Be sure to answer all parts. Rej points How...
18 3 attempts left Check my work Be sure to answer all parts. Rej points How much phosphorus-32 remains from a 8.00 g sample after each of the following number of half- lives: (a) 3; (b) 8? (a) eBook g of phosphorus-32 remains. Print (6) g of phosphorus-32 remains. Guid References
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)
1. 1. Iodine-131 is a radioactive isotope. After 8.00 days, 50.2% of a sample of 131I remains. Wh...
1. 1. Iodine-131 is a radioactive isotope. After 8.00 days, 50.2% of a sample of 131I remains. What is the half-life of 131I? 2. The half-lives of different radioisotopes are given in the table below. If the initial amount of potassium-44 is 9.2 g, how much potassium-44 is left in the body after 44 minutes? 2. 32P is a radioactive isotope with a half-life of 14.3 days. If you currently have 59.9 g of 32P, how much 32P was present...
please show all formulas/work 5. The decay constant of a radioactive source is 0.300/minute. - How...
please show all formulas/work 5. The decay constant of a radioactive source is 0.300/minute. - How much time must elapse before the activity is reduced to… (a) 85%? (b) 25%? (c) 5%? B) The half-life of a radioactive source is 14.0 minutes. - How much time must elapse before the activity is reduced by… (a) 70%? (b) 45%? (c) 20%? C) Radon-222 has a physical half-life of 30.0 days. A 10.24 microgram piece of this source is placed in storage....
1. The remains of a pre-historic human are found. The mass of carbon in the sample...
1. The remains of a pre-historic human are found. The mass of carbon in the sample is 8.5kg. The activity i.e. the number of decays per second is 700 decays/second. In living matter the ratio of 14c/?C=1.3. 10-12 14C is radioactive, whereas 12C is stable. Carbon's atomic mass is 12g per 6.02.102 atoms. The halflife of carbon is 5730 years. Make sure to label the different parts of your answer! a) How many carbon atoms are in the sample? b)...
Phosphorus-32 has a half-life of 14.3 days. How many grams remain from a 10 gram sample...
Phosphorus-32 has a half-life of 14.3 days. How many grams remain from a 10 gram sample after 13 days? Click here for a copy of Final Exam cover sheet.
11. A small quantity of solution containing 24Na radionuclide (half life 15 hours) of activity 1....
11. A small quantity of solution containing 24Na radionuclide (half life 15 hours) of activity 1.0 microcurie is injected into the blood of a person. A sample of the blood of volume 1 cm3 taken after 5 hours shows an activity of 296 disintegrations per mimute. Deterimine the total volume of blood in the body of the person. Assume that the radioactive solution mixes uniformly in the blood of the person. (1 Curie - 3.7 x 1010 disintegrations per second)...
What is the daughter nucleus (nuclide) produced when "Mo undergoes beta decay by emitting an electron?...
What is the daughter nucleus (nuclide) produced when "Mo undergoes beta decay by emitting an electron? Replace each question mark with the appropriate integer or symbol. daughter nucleus (nuclide): What is the daughter nucleus produced when Kr undergoes positron emission? Replace each question mark with the appropriate integer or symbol. daughter nucleus: ? Pb undergoes electron capture? Replace each question mark with the What is the daughter nucleus produced when appropriate integer or symbol. daughter nucleus: Iridium-192 is one radioisotope...
The half-life of tungsten-187 is 0.9875 days. How much of a 10.0 gram sample remains after...
The half-life of tungsten-187 is 0.9875 days. How much of a 10.0 gram sample remains after 71.1 hours? 1.25 g 5.00 g 2.50 g Not enough information is given.
18 3 attempts left Check my work Be sure to answer all parts. Rej points How much phosphorus-32 remains from a 8.00 g sample after each of the following number of half- lives: (a) 3; (b) 8? (a) eBook g of phosphorus-32 remains. Print (6) g of phosphorus-32 remains. Guid References
1. The remains of a pre-historic human are found. The mass of carbon in the sample is 8.5kg. The activity i.e. the number of decays per second is 700 decays/second. In living matter the ratio of 14c/?C=1.3. 10-12 14C is radioactive, whereas 12C is stable. Carbon's atomic mass is 12g per 6.02.102 atoms. The halflife of carbon is 5730 years. Make sure to label the different parts of your answer! a) How many carbon atoms are in the sample? b)...
11. A small quantity of solution containing 24Na radionuclide (half life 15 hours) of activity 1.0 microcurie is injected into the blood of a person. A sample of the blood of volume 1 cm3 taken after 5 hours shows an activity of 296 disintegrations per mimute. Deterimine the total volume of blood in the body of the person. Assume that the radioactive solution mixes uniformly in the blood of the person. (1 Curie - 3.7 x 1010 disintegrations per second)...
What is the daughter nucleus (nuclide) produced when "Mo undergoes beta decay by emitting an electron? Replace each question mark with the appropriate integer or symbol. daughter nucleus (nuclide): What is the daughter nucleus produced when Kr undergoes positron emission? Replace each question mark with the appropriate integer or symbol. daughter nucleus: ? Pb undergoes electron capture? Replace each question mark with the What is the daughter nucleus produced when appropriate integer or symbol. daughter nucleus: Iridium-192 is one radioisotope...
The half-life of tungsten-187 is 0.9875 days. How much of a 10.0 gram sample remains after 71.1 hours? 1.25 g 5.00 g 2.50 g Not enough information is given.
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