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A sample of radioactive material

Assume a sample of material must undergo a single radioactive decay process (beta decay for example). How many nuclei in the
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6.The half-life of a certain radioactive material is 32 days. An initial amount of the material has a mass of 361 kg. Write an
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The half-life of a certain radioactive material is 78 hours. An initial amount of the material has a mass of 790 kg. Write an
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The half-life of a certain radioactive material is 78 hours. An initial amount of the material has a mass of 790 kg. Write an
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The half-life of a certain radioactive material is 78 hours. An initial amount of the material has a mass of 790 kg. Write an
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The half-life of a certain radioactive material is 78 hours. An initial amount of the material has a mass of 790 kg. Write an
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The half-life of a certain radioactive material is 78 hours. An initial amount of the material has a mass of 790 kg. Write an
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The half-life of a certain radioactive material is 42 days. An initial amount of the material has a mass of 49 kg. Write an
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The half-life of a certain radioactive material is 42 days. An initial amount of the material has a mass of 49 kg. Write an
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The half-life of a certain radioactive material is 38 days. An initial amount of the material has a mass of 497 kg. Write an
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