Search: If a radioisotope's half-life is

A radioisotope has a half-life of 4 days. How much of a 20-gram sample of this radioisotope remains... If a radioisotope's half-life is 2 minutes, after two half-lives there is left? A radioisotope P has a half-life of 3 s. At t = 0, a given sample of this isotope contains 8000 atom... the half time of a radioisotope is found to be 4.55 minutes. if the decay follow first order kinetic... If the half-life of a first-order decomposition reaction is 24.2 minutes, how long will it take for... 1. What is the half-life of Strontium-90? Explain your answer. Honestly I don't know how to get t... The half-life of Th-232 is 1.4E10. Find the number of disintegrations per hour emitted by 1 mol of T... The half-life of xe-133 is 126 hours. Starting with 250 mg, after 500 hours around how many mg remai... The half-life for the second-order reaction of a substance A is 58.2 s when A0 = 0.63 mol L-1 Calcul... What is the half-life of the element Lokium? what is the half-life of the nuclide If 6.90 g of (half-life = 5.30 y) are allowed to decay, how many grams would be left after 1.00 y a... I have: the half life of U-238 is 4.5 x 10^9 yr. A sample of rock of mass 1.6g produces 29 disinteg... Consider that the half-life of Polonium-210 is 140 days.What approximate daily percentage of decay d... Given that the half life of c 14 is 5,700 ,use the method c 14 dating to determine the age of a fos... The half-life for the second-order reaction of a substance A is 55.8 s when concentration of initial... Ba-140 has a half life of 13.0 days. What fraction of a sample will remain after 39 days? If I 131 has a half-life of 8 days, what fraction will be left after a year? The half-life of I-131 is 8.00 days. If a medical treatment involves a dose of 400. mg of I-131, how... If C14 has a half-life of 4,000 years, what fraction will be remaining after 36,000 years? ok so i got... the half life of carbon-14 is 5730 years, the relation c+(1/2)^ N/5730 is used to ca... If the half life of Ir - 131 is 42 days, how much would be remaining after 168 days? K-42 has a half-life of 12.4 hours. If you begin with 250g of K-42, determine how much you will hav... What is the half-life of an isotope if it decays to 12.5% of its radioactivity in 18 minutes? i know that the half life of strontium 90 half-life is 28.8 but how can i explain this??? If the half life of Pu-239 is 2.4 x 10^4 years, how many years are required for a 20-gram sample of... The​ half-life of a certain radioactive element is about 1500 years. After 2800 ​years, what per... What is the half-life of a 100.0 g sample of nitrogen-16 that decays to 12.5 g of nitrogen-16 in 21.... Ba has a half-life of 283.2 hours. How long would it take for the 50 mg of Ba in a sample to decay t... The half-life for the first-order decomposition of is 1.3*10^-5. N2O4--> 2NO2 If N2O4 is int... 1. The half-life for the (first-order) radioactive decay of 14C is 5730 yr (it emits a β ray wit... The half life of Am-241 is 432 y. If 2.00 g of Am-241 is present in a sample, what mass of Am-241 is... The half-life for the first-order conversion of A to B is 56.5 hours. How long does it take for the... 3. The half-life of a certain drug in the human body is 8 hours how long it would take for a dose... If the half-life of a certain radioactive substance is 2000 years, estimate how many years must elap... 1. The half-life of a first-order reaction is 9.89 minutes. How many minutes will have elapsed after... The half-life of P-32 is 14 days. How long after a sample is delivered can a laboratory wait to use... The half-life (t1/2) of a first order reaction is 0.100 s. What is the rate constant? a. 6.93 s-1... If the half-life of a 20.0g is known to be 24 minutes, how long will it take for only 5.0 grams of t... The half-life for the first order reaction of a substance A is 50.5 s. How much time is needed for t... What is the half-life (in h) for the decomposition of O3 when the concentration of O3 is 2.37 ✕ 10−6... The half-life of the following first order reaction is 231 seconds. What percent of the original con... The half-life of Radium-223 is 11.43 days. If a sample has a mass of 900 mg, find the mass (i... Tritium (half-life= 12.3 y) is used to verify the age of expensive brandies. If an old brandy contai... The half life of Carbon-14 is 5730 years. How much of a 1.00g sample of Carbon-14 will remain after... The​ half-life of​ carbon-14 is 5600 years. If a piece of charcoal made from the wood of a tree show... the half-life of radon-222 is 3.823 days. what was the original mass if 0.050g remains after 7.646 d... Strontium-90 has half-life of 28 years. if a 1.00-mg sample was stored for 112 years. what mass of S... a half-life of uranium-235 is 700,000,000 years. The half-life of uranium-238 is 4.463x10^11 years l... Carbon-14 has a half-life of 5700 years. The charcoal from a tree killed in the volcanic eruption... If the half-life of a radionuclide is 1 month, is a sample of it completely decayed after 2 months? The half-life of sodium-24 is 14.9 hours. A hospital buys a 40 mg sample of sodium-24. a) How many... half life of tritium is 12.5 years. how much will remain after 100 years if you started wit 256 gram... The half-life of Palladium-100 is 4 days. A lab is working with a sample of with 3250mg. Write a fun... the half life radium-222 is 4 days. if a sample of radon-222 undergoes decay for 12 days, how much o... Potassium-42 has a half-life of12.4 hrs. How much of an 848g sample of K-42 will be left after 62 hr... The half-life of carbon-14 is about 5700 years. You find a piece of cloth painted with organic dye... The half life of an element x is 5days. If we have 5g of x initially, what is the mass of x after Tritium (half-life = 12.3 y) is used to verify the age of expensive brandies. If an old brandy conta... The half-life of Radon-222 is 3.83 days. How many days will it take for a sample to decay to 69% of... if the half life of a radiosotope is 10years,starting with 80 atoms of this isotope,how many atoms w... Radon-22 has a half life of 4 days. If you begin with 32 grams of radon, how many grams will be lef... Iodine-131 has a half-life of 8 days. How many grams of a 12 g sample will remain at the end of 40 d... Iodine-131 has a half life of 2.2 × 10-2 year. How long will it take to reduce a 130 g sample of 131... the half-life of iodine-131 is 8 days. how much iodine-131 will be left After 35 grams sample after... The half -life of carbon-14 is 5,730 years.how much of an initial amount of this substance would re... If the half-life of iodine-131 is 8 day, how much would remain undecayed after 8 day if we started w... Radium-223 has a half-life of 11.4 days.Approximately how long would it take for the activity of a s... 11) The Half-Life of Tylenol is approximately 3 hours. If you take 1000mg, how Tylenol much is left... The half-life of lead is 22 years. How long will it take for a sample of this substance to decay... The half life of iodine - 131 is 8 days. How long will it take for 7/8 of the sample to decay? sodium-24 has a half life of 15 hours,how much of a 50 gram sample will be left after 60 hours An element has a half-life of 30 years. If 1.0 mg of this element decays over a period of 90 years... If the half life of a reaction A is 2 mins,how long will it take A to reach 25% of its initial conce... The half-life for radioactive decay of 14C is 5730 years (it emits β-particles with energy of 0.16... An element has a half-life of 29 hours. If 100 mg of the element decays over a period of 58 hours,... The half-life of stronitum-90 is 28 years. How many grams of this nuclide in a 4.00g sample will re... iodine 131 has a half life of 8 days. If 5 mg are stored for a week, how much is left? How many days... The half-life of Palladium-100 is 4 days. After 12 days a sample of Palladium-100 has been reduced t... Neptunium-239 has a half-life of 2.35 days. How many days must elapse for a sample of 239Np to decay... The half life of U238 is 4.5 x 10^9 yr. A sample of rock of 1.6 g produces 29 dis/sec. Assuming all... the half life of F18 is 2.089x10^-4yrs. How long would it take (in days) for F18 to decrease to 78.7... The half-life of strontium-90 is 28 years. How long will it take a 60 mg sample to decay to a mass o... The half life of an element Z is 10days. if there are 10g of Z intially, what will be its mass after... Explain how the half-life of a radioactive isotope affects the usefulness of that isotpe in dating s... The half life of a certain radioactive substance is 10 years. How long will it take for 18 gms of th... What is the half-life of a compound if 69 percent of a given sample of the compound decomposes in 59... If radon-222 has a half-life of 3.8 days, determine how long it takes for only 1/8 of a sample to re... The half-life of tritium is approximately 12 years. What will be the molar ratio of tritium to heliu... assume the half-life of the substance is 31 days and the initial amount is 183.9 grams. (a) Fil... The half life of a radioactive material is 120 months. How much of this material will be left after... The half-life of Strontium-90 is 28 a. If 60 g of this isotope is currently in a sample of soil, est... The half-life of a certain radioactive isotope is 32 hours.What fraction of the sample would remain... Aluminum-30 has a half-life of 3.6 seconds. a) What percentage of an initial sample will remain aft... What is the half-life of sodium-24? Explain how you determined your answer. Sodium-24 decays by bet... The half-life of radon-222 is 3.82 days. If a sample of gas contains 4.38ug of radon-222, how much w... the half life of the carbon isotope C14 is about 5700 years. A. about how many years does it take... The half-life of oxygen -15 is 124 seconds. If a sample of oxygen -15 has an activity of 4000 becque... Potassium-42 has a half-life of 12.4 hours. How much of a 1600g sample of potassium-42 will be left... A certain drug has a half-life of 2 hours in the bloodstream. The label says to take the drug every...