Search: The half-life of rubidium-87 (natural

The half-life of rubidium-87 (natural absorbance 27.83%) is 5.1x10^11 years. What mass of rubidium i... Natural rubidium has an average mass of 85.4678 amu and is composed of isotopes 85Rb (mass = 84.91... 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... What is the half-life of an isotope if it decays to 12.5% of its radioactivity in 18 minutes? The half-life for the first-order decomposition of is 1.3*10^-5. N2O4--> 2NO2 If N2O4 is int... 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... Given that the half life of c 14 is 5,700 ,use the method c 14 dating to determine the age of a fos... 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 (t1/2) of a first order reaction is 0.100 s. What is the rate constant? a. 6.93 s-1... The half-life for the second-order reaction of a substance A is 55.8 s when concentration of initial... 3. The half-life of a certain drug in the human body is 8 hours how long it would take for a dose... The half-life for the first order reaction of a substance A is 50.5 s. How much time is needed for t... 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 conversion of A to B is 56.5 hours. How long does it take for the... If the half life of Ir - 131 is 42 days, how much would be remaining after 168 days? 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... 1. What is the half-life of Strontium-90? Explain your answer. Honestly I don't know how to get t... The half-life for the second-order reaction of a substance A is 58.2 s when A0 = 0.63 mol L-1 Calcul... 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 P-32 is 14 days. How long after a sample is delivered can a laboratory wait to use... 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 of a certain radioactive element is about 1500 years. After 2800 ​years, what per... i know that the half life of strontium 90 half-life is 28.8 but how can i explain this??? The half-life of xe-133 is 126 hours. Starting with 250 mg, after 500 hours around how many mg remai... 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? If C14 has a half-life of 4,000 years, what fraction will be remaining after 36,000 years? K-42 has a half-life of 12.4 hours. If you begin with 250g of K-42, determine how much you will hav... If the half-life of a first-order decomposition reaction is 24.2 minutes, how long will it take for... ok so i got... the half life of carbon-14 is 5730 years, the relation c+(1/2)^ N/5730 is used to ca... Consider that the half-life of Polonium-210 is 140 days.What approximate daily percentage of decay d... If the half-life of a certain radioactive substance is 2000 years, estimate how many years must elap... What is the half-life (in h) for the decomposition of O3 when the concentration of O3 is 2.37 ✕ 10−6... 1. The half-life of a first-order reaction is 9.89 minutes. How many minutes will have elapsed after... The half-life of the following first order reaction is 231 seconds. What percent of the original con... 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.... 1. The half-life for the (first-order) radioactive decay of 14C is 5730 yr (it emits a β ray wit... What is the half-life of the element Lokium? what is the half-life of the nuclide The half-life of I-131 is 8.00 days. If a medical treatment involves a dose of 400. mg of I-131, how... What is the half-life of polonium-218 if 5.37 minutes are required for the activity of a sample of p... The half-life of krypton-91 ^(91Kr) is 10 seconds. At time t = 0 a heavy canister contains 6 g... Tritium (half-life= 12.3 y) is used to verify the age of expensive brandies. If an old brandy contai... the half life of a radioactive substance is one day. You have 100 grams. how much of the substance w... The half-life of oxygen -15 is 124 seconds. If a sample of oxygen -15 has an activity of 4000 becque... 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 a first order reaction is determined to be 85.5 years. How long will it take for th... Half-life is a measure of the rate of decay of an isotope. True False I think it is false? Calculate the half-life (in s) of a first-order reaction if the concentration of the reactant is 0.0... Potassium-42 has a half life of 12.4 hours. How much of an 848 g sample of potassium-42 will be left... 11) The Half-Life of Tylenol is approximately 3 hours. If you take 1000mg, how Tylenol much is left... cobalt-60 has a half-life of 5.26 years, how much of a 500 gram sample will be left after 21 years the half-life of an element x is is 5 days, if we have 5g of x initially, what is the mass x after 2... The half-life caffeine in the human body is typically about 6 hours. If john drinks a large cafe moc... Tritium (half-life = 12.3 y) is used to verify the age of expensive brandies. If an old brandy conta... assume the half-life of the substance is 31 days and the initial amount is 183.9 grams. (a) Fil... The half-life of C-14 is 5700 years. If it took seven half lives for a sample of C-14 to decay comp... the half life of Uranium -238 is 4.5 billion years and the age of earth is 4.5 X 109 years. What fr... half life of tritium is 12.5 years. how much will remain after 100 years if you started wit 256 gram... Question The half-life of uranium-238 is 4.5 × 10^9 years. The half-life of uranium-234 is 2.5 ×... The half-life of Radium-223 is 11.43 days. If a sample has a mass of 900 mg, find the mass (i... the half-life of a certain drug in the bloodstream is 4 hours. what fraction of the original drug d... A certain drug has a half-life of 2 hours in the bloodstream. The label says to take the drug every... The half-life of the Nobelium isotope No^257 is about 23 seconds. 644 seconds (or 28 half-life perio... if the half life of a radioactive isotope is 80 hours how long would it take for 75% of the isotope... The half life of a certain radioactive substance is 10 years. How long will it take for 18 gms of th... The half-life of a first-order drug degradation reaction is 48hrs. Calculate the rate constant. Thx... 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 radon-222 is 3.823 days. what was the original mass if 0.050g remains after 7.646 d... The half life of gold-197 is 10.6. What fraction of a sample remains after 21.2 years? Half life of given sample is 44 years . The sample will reduce to 50 % of the original value after ?... The half-life of Radon-222 is 3.83 days. How many days will it take for a sample to decay to 69% of... ions have a half life of 1.8*10exp(-8)sec. A pion beam leaves an accelerator at a speed of 0.8c, Wha... Iron -59 has a half -life of 45.1 days. How old is an iron nail if the Fe-59 content is 25% that of... The half-life of uranium-235 is 700000000years The half-life of uranium-238 is 4.463 * 10 ^ 11 years... The half-life of Palladium-100 is 4 days. After 12 days a sample of Palladium-100 has been reduced t... Barium – 122 has a half-life of 2 minutes. Suppose you obtain a sample weighing 100.0 g and it takes... The half-life of C14 radioactive is 5760 yr. After how much time will 200 mg C14 sample be reduced t... Explain how the half-life of a radioactive isotope affects the usefulness of that isotpe in dating s... An isotope has a half-life of 56 days. It now has 10,000 DPM/ml. What is the activity in the diluted... What is the half-life of a compound if 69 percent of a given sample of the compound decomposes in 59... Element Y has a half life of 50days. How much of a 100mg of its sample will remain after 5 month? The half life of tritium is 12.3 yr. If 62.2mg of tritium is released from a nuclear power plant dur... If the half life- period of a radioactive element is 1600.After how many years will if remains 25% o... Iron-59 has a half-life of 45.1 days. How old is an iron nail if the Fe-59 content is 25% that of a... The half-life of radon-222 is 3.8 days. How much of a 300 gram sample is left after 14.8 days? The half – life for the disintegration of radium is 1590 years. Calculate the rate constant in seco... The half-life of a certain radioactive sub- stance is 8 hrs. There are 5 grams present initially. Wh... The half-life of sodium-24 is 14.9 hours. A hospital buys a 40 mg sample of sodium-24. a) How many... the half-life of rhodium rh-106 is about 30 seconds. you start with 500 grams. formula: y=ab^x The half-life of polonium-218 is 3.0 minutes. If you start with 30.0 g, how long will it be before o... The half-life of is 30.0 days. What fraction of a sample of this isotope will remain after 16.2 days... the half-life of carbon-11 is 20 minutes. How long will it btake for 600g of carbon-11 to decay to 3... What is the half-life of sodium-24? Explain how you determined your answer. Sodium-24 decays by bet... The half-life of uranium-235 is 700,000,000 years. The half-life of uranium-238 is 4.463×10^11 years... The half-life of Kryponite-123 is 40 years. Suppose we have a 700-mg sample. Find the decay k, and t... The half-life for radioactive decay of 14C is 5730 years (it emits β-particles with energy of 0.16... 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 a radioactive element X is 5days, if there is 5g of X initially, what will be the m... Radium-223 has a half-life of 11.4 days.Approximately how long would it take for the activity of a s...