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A 200 mg capsule of Aleve has a half-life of 5 hours. How many hours does...
5. The drug Xanax has a half-life of 11.2 hours. A patient took a 3 mg dosc at 8 AM. (a) Find an exponential function which models the amount of Xanax in the person's system after t hours, where t= 0 represents 8 AM. (Hint: You may want to start by figuring out two data points for this function.) (b) Approximately when will the patient have less than 0.1 mg of Xanax left in their systein? (Use your graphing technology...
16. Suppose that the allergy drug, Sneezebgone, has a half life of 12 hours and is excreted at a rate that is proportional to the amount present. At 8am, Declan takes one 10 mg dose of Sneezebgone, and then another 10mg dose at 8pm. Assuming that the drug is given intravenously via injection and mixed into his bloodstream immediately) how many mg of sneezebgone are in his system at midnight?
e18 A radioactive element has a half-life of 2.1 hours. How many hours will it take for the number of atoms present to decay to one-sixteenth of the initial value? 8.4 0.20 34 21 17
5 of 5 A certain substance has a half-life of 5.0 hours. How many nuclei of the substance are required to give an initial activity of 7.0 Cl? (1 Ci = 3.7 * 1010 Bq) 2.4 x 10 nuclei 8.5 x 10 nuclei 3.2 x 10 nuclei 6.7 x 10 nudel AR EN 246 PM Type here to search ар)
a radioactive material has a half life of 7 days. how many radioactive isotopes are left after 33 hours, if you had 7000000 isotopes in the beginning? Question 33 1 pts A radioactive material has a half life of 7 days. How many radioactive isotopes are left after 33 hours, if you had 7 000 000 isotopes in the beginning? Use 2 sig figs in your answer. < Previous Next >
1.The order is chloral hydrate 200 mg. The bottle reads chloral hydrate 0.1 g/capsule. How many capsules do you give? 2.The nurse is preparing to administer IV fluids to the 13 kg child who has dehydration. The daily IV fluid requirement is to administer 1000 ml + 50 ml/kg over 10 kg. How many milliliters should the nurse calculate to administer the IV therapy correctly?
If the half-life for decomposition of a drug is 12 hours, how long (in hours) would it take for 500 mg of the drug to decompose by 10%? Assuming first order kinetics and at a constant temperature: (Assume must be numeric; round the final answer to the nearest WHOLE number)
1) A sample of Fe-59 has a mass of 200 grams. If the half-life of Fe-59 is 45 days, how many days will it take until only 10 grams of the original sample remains? Give your answer to the nearest day. 2) Some years ago Ms. Lopez invested $5000 at 12% compounded monthly, and the account now contains $20000. How many years ago did she start the account? Give your answer to the nearest year.
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...
1. If hydrogen-3 has a half-life of 12.3 years, how many years will it take for 109.9 mg 3H to decay to 0.013 mg 3H?