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Radioactive decay can be described by the following equation In A = In A, – kt where Ag is the original amount of the substance, A is the amount of the substance remaining after time t, and k is a constant that is characteristic of the substance. For the radioactive isotope cesium-129, k is 2.17 x 10-2 hours If the original amount of cesium-129 in a sample is 57.8 mg, how much cesium-129 remains after 28.4 hours have passed? mg

Radioactive decay can be described by the following equation In A = In A, – kt where Ag is the original amount of the substance, A is the amount of the substance remaining after time t, and k is a constant that is characteristic of the substance. For the radioactive isotope cesium-129, k is 2.17 x 10-2 hours If the original amount of cesium-129 in a sample is 57.8 mg, how much cesium-129 remains after 28.4 hours have passed? mg

Chemistry: The Molecular Science
Chemistry: The Molecular Science
5th Edition
ISBN:9781285199047
Author:John W. Moore, Conrad L. Stanitski
Publisher:John W. Moore, Conrad L. Stanitski
Chapter18: Nuclear Chemistry
Section18.4: Rates Of Disintegration Reactions
Problem 18.6PSP
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Radioactive decay can be described by the following equation In A = In Ao – kt where Ag is the original amount of the substance, A is the amount of the substance remaining after time t, and k is a constant that is characteristic of the substance. For the radioactive isotope cesium-129, k is 2.17 x 10-2 hours. If the original amount of cesium-129 in a sample is 57.8 mg, how much cesium-129 remains after 28.4 hours have passed? mg
Transcribed Image Text:Radioactive decay can be described by the following equation In A = In Ao – kt where Ag is the original amount of the substance, A is the amount of the substance remaining after time t, and k is a constant that is characteristic of the substance. For the radioactive isotope cesium-129, k is 2.17 x 10-2 hours. If the original amount of cesium-129 in a sample is 57.8 mg, how much cesium-129 remains after 28.4 hours have passed? mg
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