What is the half-life (t1/2) of a radioisotope if 1000 grams of the sample decays to 125 grams in 24.3 hours?

Q: The half-life of cobalt-60 is 5.26 years. If 50 g are left after 15.78 years, how many grams were in…

A: The  formula that relates the mass remaining of the radioisotope to the original mass is given below…

Q: 3. A 50 gram sample of a radlolsotope undergoes 2 half-lives. How many grams would remain at the…

A: Half-life, in radioactivity, the interval of time required for one-half of the atomic nuclei of a…

Q: Iodine-123 is used for imaging the thyroid gland and decays at a rate of 0.0522 hr-1. If 40 mg of…

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Q: The half-life of 218Po is 3.1 minutes. How much of a 146 gram sample remains after 0.40 hours? 130…

A: Since the decay reactions are first order reactions And we know that the relationship between the…

Q: What is the half-life of I53131, in days, if its decay constant is 9.94×10−7s−1? Select the correct…

A: Decay reactions are first order reactions. Given : Decay constant = 9.94 X 10-7 s-1

Q: PLEASE PROVIDE FULL DEATAIL HANDWRITTEN sample of I-131 is produced with a decay rate of R. How…

A: Given data :- decay rate of I-131  = R Half life of I-131 = 8 days

Q: if the passing of five half -life leaves 50.0g of a of radioisotope sample, how much was present in…

A: Mass of sample after 5 half life = 50 g Initial amount = ?

Q: Question 45 If the half life of P-32 is 14 days, how many grams will remain after 42 days if we…

A: 1- First we will determine the Rate constant ( k ) :  k = 0.6931 / half life  k = [ 0.6931 / 14 day…

Q: The nuclide 3Cl decays by beta emission with a half-life of 37.2 min. A sample of 0.40 mol of H*Cl…

A: Half life of the reaction is the time of the reaction in which the concentration of the reactant…

Q: A chemical degrades over time, and the amount of chemical present in a sample is an exponential…

A: Radioactive isotopes decay with time. Each isotope has its half life. Alpha, beta and gamma…

Q: If the half-life for I-131 is 8 days and a patient is given 1.35 mg of this nucleus at 5:00 am in…

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Q: Question 9 The radioactivity of a 99mTc sample is measured 94 mCi at 5:00 PM. What time was it…

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Q: The half-life of Tl-201 is 3.0 days. How many days will it take until the activity of the Tl-201 in…

A: The radioactive decay follows first-order kinetics. The half-life of a radioactive substance is…

Q: 1. What is the half-life of a radioactive isotope if a 500.0g sample decays to 62.5g in 24.3 hours

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Q: The half-life of Po-214 is 0.001 seconds. How much of a 10 gram sample is left after 0.003 seconds?

A: Half life of Polonium, t1/2 = 0.001 second Mass of sample = 10 g

Q: NUCLEAR REACTIONS Nickel-56 decays with a half-life of 6.075 days. 1. Write the balanced nuclear…

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Q: If the half-life of phosphorus-32 is 14.3 days, how much of a 200. mg sample of phosphorus-32…

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Q: If the half-life of Xe-133 is 5.2 h, what will be the activity of the initially 20.-mCi sample after…

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Q: how much C-14 would be left from a 5000 year-old sample that started as 150 grams? (One Answer) N =…

A: All the values are given in the question and formula is given. Put the values and get the answer.

Q: contains 1.6 mmol of C-14, how many millimoles will be left after 2245 year millimoles using two…

A: For first order Reaction,  k = 0.6931 / ( half life )  k = 0.6931 / 5730year  k = 0.000121 year-1

Q: 50 ng of a radioactive isotope with a half-life of 23 seconds is expected to decay exponentially.…

A: The initial amount of the given radioactive isotope is = 50 ng The half-life of the given…

Q: 1.)There are 5.0 g of 121I left after 40.35 days. How many grams were in the original sample if its…

A: Half-life is the time required for an amount to reduce to half its initial value.From the given…

Q: Question: The half-life of a radioactive element is 50 minutes. How long will it take the mass of…

A: Introduction It should be remembered that the order of radioactive decay always remains equivalent…

Q: Be sure to answer all parts. A freshly isolated sample of 90Y was found to have an activity of 6.6 x…

A: Given : A1 = 6.6 ×105 per minute A2 = 1.8 × 104 per minute   Find : To calculate The half-life  is…

Q: sample

A: We will calculate t1/2 by the help of given information

Q: If a radioisotope's half-life is 2 minutes, after two half-lives there is left   0% of the original…

A: Given, a radioisotope's half-life is 2 minutes.we are asked to calculate the amount of original…

Q: Chemistry The 35S atom on a radiolabeled amino acid, methionine, has a half-life of 87.4 days. What…

A: In a radioactive element, the decay of the nucleus of the element takes place due to the imbalance…

Q: If the half-life of C-14 is 5730 years, how much C-14 would be left from a 5000 year-old sample that…

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Q: A radioisotope tracer has a half-life of 2 minutes. If a level of <1% is considered safe, when would…

A: We will calculate the time of radioactive tracer by using  radioactive decay process.

Q: After 24 days, 2.0 mg of an original 128 mg sample remain. Find the half-life of the sample. a. 2…

A: Given: Initial amount of sample = 128 mg Remaining amount of sample = 2.0 mg Time elapsed = 24 days

Q: The half-life of strontium-91, is 9.70 hours. The decay constant is _____ x 10 ^-5 s^-1. For an…

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Q: Manganese-56 is beta emitter with a half life of 2.6 hours. How much was in the original sample if…

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Q: For a radioisotope where k=1.7x10-4yr1, how old is a sample when only 10% remains? O 5,900 years 590…

A: The radioactive compound emits continuously α, β, and γ particles and converted to a stable nucleus.…

Q: A sample has a half life of 100 years. If it has been 200 years since it started to decay and there…

A: The question is based on the concept of chemical kinetics. we have to calculate initial mass of the…

Q: A radioactive isotope, X-90, has a half-life of 82.6 years. How many years (y) will it take for 34 %…

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Q: If bismuth-210 has a half-life of 5.0 days and you started with 30.59 grams and you stopped the…

A: Given: Half-life of bismuth-210 = 5.0 days = 120 hours Initial amount of bismuth-210 [N]0 = 30.59 g…

Q: The half-life of strontium−90 is 29.1 years. Calculate the radioactivity in millicuries of 11.5 mg…

A: Given, Half life of strontium, t1/2 = 29.1 yr Mass of strontium = 11.5 mg = 0.0115 g    (1 mg =…

Q: The radioactive nuclide has a shelf-life of 17.5 hours. What mass remains from 0.0100g sample after…

A: Rate of a reaction determines the speed with which a reaction proceeds. First order reaction is a…

Q: A moon rock collected by a U.S. Apollo mission is estimated to be 4.20 billion years old by…

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Q: The radioactive isotope 212Pb has a half-life of 10.64 h. A sample containing this isotope has an…

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Q: The half-life of a radioactive nuclide is Group of answer choices none of the above the time at…

A: The half-life of a radioactive nuclide is, that period of time in which 50% of the original number…

Q: Calculate how long will it take for a sample of a radionuclide with a half-life of 39.9 days decay…

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Q: Gold-198 has a half-life of 2.7 days. How much of a 953.1 mg gold-198 sample will remain after 13.5…

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Q: 8.0mg of a radioisotope of half-life 30 minutes is used for 12 minutes. What is the amount of the…

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Q: Phosphorus-32 has a half-life of 14.0 daysdays. Starting with 2.00 gg of 32P32P, how many grams will…

A: Hello. Since your question has multiple parts, we will solve the first question for you. If you want…

Q: Calculate the binding energy in kilocalories/ mole of 19F whose atomic weight is 19.0045.

A: Calculate the binding energy in kilocalories/ mole of 19F whose atomic weight is 19.0045.

Q: You take a course in archacology that includes field work. An ancient wooden totem pole is excavated…

A: The above question can be solved using the formula  t1/2 = 0.693/k Where k is the rate constant k=…

Q: If pure polonium-210 (k = 5.02 x 10-3 day-1) were used in a crime, based on radioactive…

A: Given: Rate constant of decay = 5.02 × 10-3 day-1  And the amount of isotope decayed = 30% of the…

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.