5. Half life is the time when the initial concentration reduces to half. There are 24/6 = 4 half lives in 24 hours.
[A] =[A0] (1/2)^n = 0.05*(1/2)^4 = 0.0031 M
Concentration after 24 hours = 0.0031 M
There are 48/6 = 8 half lives in 48 hours.
Concentration after 48 hrs = 0.05*(1/2)^8 = 0.00019 M
please help me with answers thanks Experiment 14 - Nuclear Chemistry iven 0.050 mg of technetium-99m,...
MI Review Constants 1 Periodic Table A patient is given 0.050 ug of technetium-99m, a radioactive isotope with a half-life of about 6.0 hours. - Part A How long does it take for the radioactive isotope to decay to 4.5x10-3 ug ? (Assume no excretion of the nuclide from the body.) Express your answer using two significant figures. O AQ R O ? Submit Request Answer Provide Feedback Next > Next >
1. A patient is given 0.050 mg of technetium-99 m, a radioactive isotope with a half-life of about 6.0 hours. How long does it take for the radioactive isotope to decay to 4.2×10−3 mg ? (Assume no excretion of the nuclide from the body.) Express your answer using two significant figures.
A patient is given 0.055 μg of technetium-99m, a radioactive isotope with a half-life of about 6.0 hours. How long does it take for the radioactive isotope to decay to 2.7×10−3 μg ? (Assume no excretion of the nuclide from the body.) Express your answer using two significant figures.
One of the nuclides in spent nuclear fuel is U-235 , an alpha emitter with a half-life of 703 million years.How long will take for the amount of U-235 to reach 49.0% of its initial amount?
One of the nuclides in spent nuclear fuel is U-235, an alpha emitter with a half-life of 703 million years. How long would it take for the amount of U-235 to reach 1/4 of its initial amount?
If a 500. mg sample of technetium-99m is used for a diagnostic procedure, how much Tc-99m remains after each interval: (a) 12.0 h; (b) 24.0 h? (The half life of technetium-99m is 6.0 hours.) NINETE ch 5 attempts left Check my work SICH Be sure to answer all parts. If a 500. mg sample of technetium-99m is used for a diagnostic procedure, how much Tc-99m remains after each interval: (a) 12.0 h; (b) 24.0 h? (The half-life of technetium-99m is...
Q#2: What is the half-life of technetium-99m in minutes? Hours? Technetium (chemical symbol Tc) is a silver-gray, radioactive metal. It occurs naturally in very small amounts in the earth's crust, but is primarily man- made. Technetium-99 is produced during nuclear reactor operation, and is a byproduct of nuclear weapons explosions. Technetium-99 can be found as a component of nuclear waste. Technetium-99m is a short-lived form of Tc-99 that is used as a medical diagnostic tool. As this isotope decays, it...
A patient is given 0.055 mg of technetium-99 m, a radioactive isotope with a half-life of about 6.0 hours. Part A How long does it take for the radioactive isotope to decay to 2.3×10−3 mg ? (Assume no excretion of the nuclide from the body.) Express your answer using two significant figures
I know how to solve normal 1/2 life equations but this one is confusing me! Please help me get both parts. I know the standard equations of t(1/2) = ln(2) / k & At= A0 e ^ (-kt) but those didn't work when i tried. i got stuck! thanks! :) This question has multiple parts. Work all the parts to get the most points. Radioactive cobalt-60 is used extensively in nuclear medicine as a γ-ray source. It is made by...
A fossil was dated using rubidium-87, which undergoes beta decay and has a half-life of 4.75x1010 years. Calculate the age of the fossil if (5.7x10^1)% of rubidium-87 remains in the sample. Report your answer with 2 significant figures. Note: Your answer is assumed to be reduced to the highest power possible. Your Answer: X10 Answer units Question 2 (1 point) Thallium-201 is used to diagnose heart disease. The half-life of thallium-201 is 72.9 hours. If a patient takes 7.7 ug,...