Search: half life of a drug

if 1g of a drug whose half-life is 9 hours is administered intravenously, how much of the drug is le... a drug has a half life of 5 hours. write the exponential function that gives the concentration of th... A certain drug has a half-life of 2 hours in the bloodstream. The label says to take the drug every... A certain drug has a half-life of about 2 hours in blood stream. The drug is formula to be administe... the half-life of a certain drug in the bloodstream is 4 hours. what fraction of the original drug d... half life of a drug in the bloodstream is 14 hours. By what factor does the concentration of the dru... if a drug has a half life, after half of the drug leaves does it continue acting on the body Ba-140 has a half life of 13.0 days. What fraction of a sample will remain after 39 days? If C14 has a half-life of 4,000 years, what fraction will be remaining after 36,000 years? If I 131 has a half-life of 8 days, what fraction will be left after a year? what is the half-life of the nuclide 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 xe-133 is 126 hours. Starting with 250 mg, after 500 hours around how many mg remai... What is the half-life of the element Lokium? 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 Ir - 131 is 42 days, how much would be remaining after 168 days? The half-life (t1/2) of a first order reaction is 0.100 s. What is the rate constant? a. 6.93 s-1... 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 second-order reaction of a substance A is 58.2 s when A0 = 0.63 mol L-1 Calcul... The half-life for the first-order decomposition of is 1.3*10^-5. N2O4--> 2NO2 If N2O4 is int... 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... 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... What is the half-life (in h) for the decomposition of O3 when the concentration of O3 is 2.37 ✕ 10−6... Consider that the half-life of Polonium-210 is 140 days.What approximate daily percentage of decay d... The half-life for the second-order reaction of a substance A is 55.8 s when concentration of initial... The half-life of P-32 is 14 days. How long after a sample is delivered can a laboratory wait to use... 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 of I-131 is 8.00 days. If a medical treatment involves a dose of 400. mg of I-131, how... K-42 has a half-life of 12.4 hours. If you begin with 250g of K-42, determine how much you will hav... 1. What is the half-life of Strontium-90? Explain your answer. Honestly I don't know how to get t... 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... 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... 1. The half-life of a first-order reaction is 9.89 minutes. How many minutes will have elapsed after... The half-life of Th-232 is 1.4E10. Find the number of disintegrations per hour emitted by 1 mol of T... 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.... The​ half-life of a certain radioactive element is about 1500 years. After 2800 ​years, what per... The half-life of the following first order reaction is 231 seconds. What percent of the original con... i know that the half life of strontium 90 half-life is 28.8 but how can i explain this??? The half-life for the first order reaction of a substance A is 50.5 s. How much time is needed for t... 1. The half-life for the (first-order) radioactive decay of 14C is 5730 yr (it emits a β ray wit... If the half-life of a certain radioactive substance is 2000 years, estimate how many years must elap... Given that the half life of c 14 is 5,700 ,use the method c 14 dating to determine the age of a fos... If the half-life of a first-order decomposition reaction is 24.2 minutes, how long will it take for... The half-life for the first-order conversion of A to B is 56.5 hours. How long does it take for the... ok so i got... the half life of carbon-14 is 5730 years, the relation c+(1/2)^ N/5730 is used to ca... carbon 14 has a half life of 5715 years. If you start with a 5 gram sample of 14C, what mass is left... the half-life of carbon-11 is 20 minutes. How long will it btake for 600g of carbon-11 to decay to 3... if the half life of a radiosotope is 10years,starting with 80 atoms of this isotope,how many atoms w... How to work out: The half-life of Indium-116 is 14 seconds. How long will it take for 32g of this is... The half-life of carbon 14, which is commonly used to date organic materials, is 5700 years. What is... The half-life for the process 238 U --> 206 Pb is 4.5*10^9 yr. A mineral sample contains 66.0 mg of... The half-life of a reaction was found to be inversely dependent on the concentration of the starting... The half-life of carbon 14 is 5730 years. if a 1 g sample of old carbon is 1/8 as radioactive as 1 g... Pu-239 has a half-life of 24110 y. If 1.00 kg of this isotope is present in the used fuel rods of a... The half life of radon 222 is 3.82 days. If the initial mass of a sample of radon 222 is 198.72 gram... The half-life of sodium-24 is 14.9 hours. A hospital buys a 40 mg sample of sodium-24. a) How many... Uranium-238 has half life of 4.51 * 10^9 years Uranium-234 has half life of 2.48 * 10^5 years Thor... The half life of an element x is 5days. If we have 5g of x initially, what is the mass of x after The half life of an element Z is 10days. if there are 10g of Z intially, what will be its mass after... Potassium-42 has a half-life of 12.4 hours. How much of a 1600g sample of potassium-42 will be left... The half-life of an element is important for determining the _______ of a rock. A. relative age B.... Radon-222 has a half-life of 3.8days. What gram of radio isotopes will remain after 11.4days if you... The half-life for the process 238U 206Pb is 4.5 109 yr. A mineral sample contains 45.9 mg of 238U an... Iodine-131 has a half life of eight days. What mass of iodine-131 would remain from a 20g sample aft... If a substance has a half life of 600 seconds. If a scientist begins with an initial amount of 1kg c... Carbon-14 has a half-life of 5730 years In a plant fossil you find that the 14 C has decayed to 1/8... The half-life for the radioactive decay of calcium-47 is 4.5 days.If a sample has an activity of 4.0... Half life of given sample is 44 years . The sample will reduce to 50 % of the original value after ?... Nobelium -259 has a half life of 58 min? How much remains of 1kg sample after 1 day? Use the form... 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 cobalt-60 is 5.20 years.. how many milligrams of a 2.000-mg sample remains after 6.... The half-life of a radioactive material is about 34.6 years. How much of a 1-gram sample of the mate... A material has a half-life of 12 hours. If initially there are 4 grams of the material, how much is... The half-life of Radium-226 is 1590 years. If a sample contains 100 mg, how many mg will remain afte... the half life of isotope X is 2.0 years how many years would it take for 4.0 mg sample of X to decay... if carbon 14 has a half life of 24 days how much would be left of 220 gram sample after 168 days the half life of a radioactive substance is one day. You have 100 grams. how much of the substance w... Nitrogen-13 has a half-life of 10 minutes. Given a starting mass of 2.00 g of nitrogen-13, how many... The half life of phosphorus -32 is 14.3 days. What percentage of an original samples radioactivity r... To bobpursley, the half life is 40.(potassium 40) half life carbon -14 is 5,730 years. If you start out 50 grams, how long will it take until it reach... If half life of iodine 131 is 8 days, how much from 32g remain after 40 days (5 half lives). Barium – 122 has a half-life of 2 minutes. Suppose you obtain a sample weighing 100.0 g and it takes... Suppose that the half-life of a substance is 250 yrs. .If there were initially 100 g of substance .H... the half life of oxygen-15 is 124 s. if a sample of oxygen-15 has an activity of 4000 Bq, how many m... The half- life of a positron is very short. it reacts with an electron, and the masses of both are c... The half-life of carbon-14 is 5730 years. If we start with 10 grams of carbon-14, after 5730 years,... The half life of the radio active substance is the time require the half the substance to decay. th... Carbon-15 has a half-life of 5730 years. As observed from Earth, what would the half-life of carbon-... Carbon-14 has a half-life of approximately 5,730 years. How many half-lives have occurred in a sampl... Cesium-137 has a half life of 30.0 years. If initially there are 8.0 kg of cesium-137 present in a... The half life of a radioactive sample is 6.93 days.after how many days will only one -tenth of the s... The half-life of Radium-223 is 11.43 years. What is the annual decay rate? Express the result to fou... Radium-221 has a half-life of 30 s. How long will it take for 95% of a sample to decay The half life of a radioactive element X is 5days, if there is 5g of X initially, what will be the m... 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 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 carbon-14 is 5,730 years.how much of an initial amount of this substance would re... 11) The Half-Life of Tylenol is approximately 3 hours. If you take 1000mg, how Tylenol much is left...