Cesium- 137, a beta emitter, has a half-life of 30y. - How many grams of a...
Cesium- 137, a beta emitter, has a half-life of
30y.
- How many grams of a 16g sample of Cesium- 137 would remain after
90y.
- How many years will be needed for a 28g of Cesium- 137 to devay to 3.5 g of Cesium- 137.
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Cesium- 137, a beta emitter, has a half-life of
30y.
- How many grams of a...
An isotope of cesium (Cesium-137) has a half-life of 30 years. If 1.0 mg of cesium-137...
An isotope of cesium (Cesium-137) has a half-life of 30 years. If 1.0 mg of cesium-137 disintegrates over a period of 90 years, how many mg of cesium-137 would remain? 14. Thallium-208 has a half-life of 3.053 min. How long will it take for 120.0g to decay to 7.500 15. Element-106 has a half-life of 0.90 seconds. If one million atoms of it were prepared, how many atoms would remain after 4.5 seconds? 16. A 2.5 gram sample of an...
Cesium-137, used in cancer treatment, has a half- life of 30 years. are here 1974 used...
Cesium-137, used in cancer treatment, has a half- life of 30 years. are here 1974 used in cancer treatment, has a half- Part A Enter the balanced nuclear equation for the beta decay (e) of cesium-137 Express your answer as a nuclear equation. Α. ΑΣφ on? Subrnit Previous Answers Request Answer Part B How many milligrams of a 24 mg sample of cesium-137 remain after 120 years? Express the mass to two significant figures and include the appropriate units. Value...
The half-life of cesium-137 is 30 years. Suppose we have a 18-gram sample. (a) Find the...
The half-life of cesium-137 is 30 years. Suppose we have a 18-gram sample. (a) Find the yearly growth factor a. (Round your answer to five decimal places.) a = (b) Find an exponential model m(t) = Cat for the mass remaining after t years. m(t) = (c) How much of the sample will remain after 85 years? (Round your answer to two decimal places.) g (d) After how long will only 3 g of the sample remain? (Round your answer...
Cesium-137 has a half-life of 30 years. If you start with 1.0 g of 137Cs, how...
Cesium-137 has a half-life of 30 years. If you start with 1.0 g of 137Cs, how much 137Cs will be remaining after 60 years? O 0.30 g O 0.50 g O 0.90 g O 0.00 g O 0.25 g SUBMIT
The half-life of cesium-137 is 30 years. Suppose we have a 89 g sample. Find a...
The half-life of cesium-137 is 30 years. Suppose we have a 89 g sample. Find a function that models the mass m remaining after t years.
Polonium-208 is an alpha emitter with a half-life of 2.90 years. How many milligrams of polonium...
Polonium-208 is an alpha emitter with a half-life of 2.90 years. How many milligrams of polonium from an original sample of 5.00 mg will remain after 8.00 years?
part A: How many years old is a sample of cesium-137 if the sample emits only...
part A: How many years old is a sample of cesium-137 if the sample emits only 35.2% of its initial radioactivity? The half-life of cesium-137 is 30.2 years part B Where does the tiny amount of mass go when a nuclear reaction takes place? What should the sign on the change in energy be when mass is lost in a nuclear reaction? Why?
The half-life of cesium-137 is 30 years. Suppose we have a 17-g sample. Find a function...
The half-life of cesium-137 is 30 years. Suppose we have a 17-g sample. Find a function that models the mass remaining after t years. O m(t) = 20e -0.036 m(t) = 17e-0.0241 m(t) = 30e -0.0231 O m(t) = 20e -0.021 m(t) = 17e-0.0231
1. Polonium-209, an α emitter, has a half-life of 102 years. How many α particles are...
1. Polonium-209, an α emitter, has a half-life of 102 years. How many α particles are emitted in 1.5 s from a 1.2 ng sample of 209Po? 2. A 1.0 mg sample of 126Sn decays initially at a rate of 4.6×105 disintegrations/s. What is the half-life of 126Sn in years?
13. The half ife of cesium-137 is 30 years. Suppose we have a 25g sample. a....
13. The half ife of cesium-137 is 30 years. Suppose we have a 25g sample. a. (1 that models the mass remaining after t years l point) Find a function m)- m,2 13a b. (2 points) Find a function me)me-" that models the mass remaining after t years In 2 (recall that r I), Do Not round. 13b: 2 points) How much of the sample will remain after 95 years? Round to the nearest ten-thousandth C. ( 13c:,
An isotope of cesium (Cesium-137) has a half-life of 30 years. If 1.0 mg of cesium-137 disintegrates over a period of 90 years, how many mg of cesium-137 would remain? 14. Thallium-208 has a half-life of 3.053 min. How long will it take for 120.0g to decay to 7.500 15. Element-106 has a half-life of 0.90 seconds. If one million atoms of it were prepared, how many atoms would remain after 4.5 seconds? 16. A 2.5 gram sample of an...
Cesium-137, used in cancer treatment, has a half- life of 30 years. are here 1974 used in cancer treatment, has a half- Part A Enter the balanced nuclear equation for the beta decay (e) of cesium-137 Express your answer as a nuclear equation. Α. ΑΣφ on? Subrnit Previous Answers Request Answer Part B How many milligrams of a 24 mg sample of cesium-137 remain after 120 years? Express the mass to two significant figures and include the appropriate units. Value...
Cesium-137 has a half-life of 30 years. If you start with 1.0 g of 137Cs, how much 137Cs will be remaining after 60 years? O 0.30 g O 0.50 g O 0.90 g O 0.00 g O 0.25 g SUBMIT
The half-life of cesium-137 is 30 years. Suppose we have a 17-g sample. Find a function that models the mass remaining after t years. O m(t) = 20e -0.036 m(t) = 17e-0.0241 m(t) = 30e -0.0231 O m(t) = 20e -0.021 m(t) = 17e-0.0231
13. The half ife of cesium-137 is 30 years. Suppose we have a 25g sample. a. (1 that models the mass remaining after t years l point) Find a function m)- m,2 13a b. (2 points) Find a function me)me-" that models the mass remaining after t years In 2 (recall that r I), Do Not round. 13b: 2 points) How much of the sample will remain after 95 years? Round to the nearest ten-thousandth C. ( 13c:,
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