2uiz 1: Prep U Dudek Sec Course Home 5.3: Radiation Measurem. Amazon.com: Periodic ta ng.pearson.com/?courseld=13266708\#/ Review Constants Periodic Table Part A The recommended dosage of iodine-131 is \( 4.20 \mu \mathrm{Ci} / \mathrm{kg} \) of body mass. How many microcuries of iodine-131 are needed for a 72.0 kg person with hyperthyroidism? Express your answer using three significant figures. \( \square \) \( \mu \mathrm{Ci} \) Submit Request Answer
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- Recommended dosage of iodine-131: \(4.20 \, \mu \mathrm{Ci} / \mathrm{kg}\) - Body mass of the person: \(72.0 \, \mathrm{kg}\) Show more…
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a. The recommended dosage of iodine-131 is $4.20 \mu \mathrm{Ci} / \mathrm{kg}$ of body mass. How many microcuries of iodine- 131 are needed for a 70.0-kg person with hyperthyroidism? b. A person receives 50 rad of gamma radiation. What is that amount in grays?
Nuclear Chemistry
Radiation Measurement
a. The recommended dosage of iodine- 131 is $4.20 \mathrm{mCi} / \mathrm{kg}$ of body mass for treatment of hyperthyroidism. How many microcuries of iodine- 131 are needed for a $75.0-\mathrm{kg}$ person? b. A person receives 50 rad of gamma radiation. What is that amount in grays?
Iodine-123 is a radioactive isotope used in medicine to test the function of the thyroid gland. Its half-life is 13.1 hours. A 400-microcurie (µCi) dose of iodine-123 is administered to a patient. The quantity, Q, left in the body after t hours is given by the equation Q = 400 * (1/2)^(t/13.1). Answer parts (a) through (d) a) Determine the time it takes for the level of iodine-123 to drop to 5 µCi. It takes 82.82 hours for the level of iodine-123 to drop to 5 µCi. (Type an integer or decimal rounded to two decimal places as needed.) b) Determine the rate of change of the quantity of iodine-123 at 18 hours. The rate of change of iodine-123 at 18 hours is -55.88 µCi/hr. (Type an integer or decimal rounded to two decimal places as needed.)
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