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a. What is the mass of technetium-99m present at 200 minutes? 115. A common isotope used in medical imaging is technetium-99m, which emits gamma rays. At 400 minutes? b. What is the half-life of technetium-99m in minutes? In hours? c. If a patient is given a 2.0-ug dose of technetium-99m, how much of it is left in the patient's body after 10 hours? (For this problem, assume that the technetium-99m is not biologically removed from the body.) "Tc Te + y A sample initially containing 0.500 mg of technetium-99m is monitored as a function of time. Based on its rate of gamma ray emission, a graph, showing the mass of active technetium-99m as a function of time, is prepared. Study the graph and answer the questions that follow. 0.6 0.5- 0.4 0.3 0.2- 0.1 200 400 600 800 1000 Time (minutes) A Mass of Technetium-99m as a Function of Time Mass technetium-99m (grams)

a. What is the mass of technetium-99m present at 200 minutes? 115. A common isotope used in medical imaging is technetium-99m, which emits gamma rays. At 400 minutes? b. What is the half-life of technetium-99m in minutes? In hours? c. If a patient is given a 2.0-ug dose of technetium-99m, how much of it is left in the patient's body after 10 hours? (For this problem, assume that the technetium-99m is not biologically removed from the body.) "Tc Te + y A sample initially containing 0.500 mg of technetium-99m is monitored as a function of time. Based on its rate of gamma ray emission, a graph, showing the mass of active technetium-99m as a function of time, is prepared. Study the graph and answer the questions that follow. 0.6 0.5- 0.4 0.3 0.2- 0.1 200 400 600 800 1000 Time (minutes) A Mass of Technetium-99m as a Function of Time Mass technetium-99m (grams)

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a. What is the mass of technetium-99m present at 200 minutes? 115. A common isotope used in medical imaging is technetium-99m, which emits gamma rays. At 400 minutes? b. What is the half-life of technetium-99m in minutes? In hours? c. If a patient is given a 2.0-ug dose of technetium-99m, how much of it is left in the patient's body after 10 hours? (For this problem, assume that the technetium-99m is not biologically removed from the body.) "Tc Te + y A sample initially containing 0.500 mg of technetium-99m is monitored as a function of time. Based on its rate of gamma ray emission, a graph, showing the mass of active technetium-99m as a function of time, is prepared. Study the graph and answer the questions that follow. 0.6 0.5- 0.4 0.3 0.2- 0.1 200 400 600 800 1000 Time (minutes) A Mass of Technetium-99m as a Function of Time Mass technetium-99m (grams)
Transcribed Image Text:a. What is the mass of technetium-99m present at 200 minutes? 115. A common isotope used in medical imaging is technetium-99m, which emits gamma rays. At 400 minutes? b. What is the half-life of technetium-99m in minutes? In hours? c. If a patient is given a 2.0-ug dose of technetium-99m, how much of it is left in the patient's body after 10 hours? (For this problem, assume that the technetium-99m is not biologically removed from the body.) "Tc Te + y A sample initially containing 0.500 mg of technetium-99m is monitored as a function of time. Based on its rate of gamma ray emission, a graph, showing the mass of active technetium-99m as a function of time, is prepared. Study the graph and answer the questions that follow. 0.6 0.5- 0.4 0.3 0.2- 0.1 200 400 600 800 1000 Time (minutes) A Mass of Technetium-99m as a Function of Time Mass technetium-99m (grams)
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