Copper acetate containing Cu-64 is used to study brain tumors. This isotope has a half-life of 12.7 hours. If you begin with 0.25mg , what mass in milligrams remains after 38.1 hours? O a. 3.125 x 10-4 Ob. 1.250 x 10-3 Oc 3.125 x 10-2 Od. 1.563 x 10-4

Q: Pls. refer to the given answer choices so that i will know if my solution is wrong

A: 100% undecayed  at time 0 .

Q: Phosphorus-32, a radioisotope used in the treatment of leukemia, has a half-life of 14.3 days. If a…

A:

Q: The half-life for the radioactive decay of U – 238 is 4.5 billion years and is independent of…

A:

Q: Iodine-123, which is used for diagnostic imaging in the thyroid, has a half-life of 13 hours. If…

A: Given 50mg of Iodine-123 was prepared at 8AM Monday, the remaining grams present at 10AM of next day…

Q: What is the half-life of an element that begins with 100g, and 18.8g remains after 113 minutes.

A: Half life of radioactive element-is the time needed for given number of its nuclei to decay exactly…

Q: Strontium-90 is present in the fallout produced by nuclear weapons testing in the atmosphere. Sr-90…

A:

Q: Americium-241 is widely used in smoke detectors. The radiation released by this element ionizes…

A: The activity for the sample can be described as the amount of the radioactive particles are…

Q: The half-life of 129I is 1.72 x 107 years. Consider a sample that contains 2.39 x 106 atoms of this…

A:

Q: Radioactive nuclide, 90Sr, has a half-life of 30 years. What percent of a sample of 90Sr will remain…

A: Half life = 30 years  Time given = 60 years

Q: 24 g of an unknown radioactive substance decays to 1.5 g after 180 seconds. What is the half-life of…

A: To solve this problem we will use the first order chemical kinetics half life equation .

Q: Phosphorus-32 is radioactive and has a half life of 14.3 days. How long would it take a sample to…

A: Ans

Q: Iodine (131 I)  is used in diagnostic and therapeutic techniques in the treatment of thyroid…

A:

Q: Technetium-99 (half-life = 6.0 h) is used in medical imaging. How many half-lives would go by in 18…

A: technetium - 99 have half life = 6 hours

Q: The beta decay of cesium-137 has a half-life of 30.0 years. How many years must pass to reduce a 25…

A: We have given that The beta decay of cesium-137 has a half-life of 30.0 years. How many years must…

Q: [Review Topics] [References] Use the References to access important values if needed for this…

A: Interpretation -  To determine the the age of the artifact , when a radioactive isotope carbon-14…

Q: The half-life of protactinium-234 is 6.69 hours. What fraction of a given amount remains after 26.76…

A:

Q: Q#3 Iodine-123, used in the treatment of thyroid, brain, and prostate cancer, has a half-life of…

A: Given :  Half life(t1/2) = 13.2 hr  Given time (t) = 26.4 hr  Mass of sample = 64 mg  t1/2=0.693K…

Q: Radioactive vanadium-48 decays with a half-life of 16.0 days. a. What is the value of k ins? b. A…

A: Radioactive decay is a spontaneous process. Radioactive decay is a first order reaction. Thus its…

Q: Radioactive radon-222, found in many homes, is a potential health hazard. The half-life of radon-222…

A: Given Half life of Radon -222 ( t1/2 )  = 3.82 days  Initial amount of isotope ( A0 )= 33.5 mg  Time…

Q: If a sample has a half-life of 1 hour, how much of a 10.000 g sample would remain after 2 hours?

A: Any atomic nucleus which is mainly unstable tends to lose energy through radiation and this process…

Q: Thallium-201 is used medically to diagnose heart problems. The half-life of thallium-201 is 72.9…

A: Since the decay reactions are first order reaction. Hence for the first order reactions we can say…

Q: The radioactive isotope carbon-14 is used for radiocarbon dating. The half-life of carbon-14 is…

A:

Q: You have a fresh sample of 1000 grams of indium-131 isotope which has a half-life of 8.05 days. How…

A: According to the question, Given initial mass  of indium-131 isotope = 1000 g   The  Half life (t12)…

Q: You have a 3.00 g sample of chromium-51, which has a half-life of 27.8 days. How long will it take…

A: Given, You have a 3.00 g sample of chromium-51, which has a half-life of 27.8 days. The time will…

Q: Calcium – 47 has a half-life of 4.5 years . How long will it take a 100 mg sample to drop to 12.5…

A:

Writing and Balancing Nuclear Equations

A nuclear equation is a symbolic representation of a nuclear reaction using certain symbols. It is studied in nuclear chemistry and nuclear physics.