Part B - How many milligrams of an initial 54 mg of calcium-47 remain after 36 days ? Part C - How many days are required for 19.2 mg of calcium-47 to decay to 1.2 mg?

Q: If the initial sample is  1.25 g,  what mass of the original iridium‑192 remains after  65  days?…

A: According to the question we have, Initial mass (original mass) of the sample= Mo = 1.25 g Time (t)…

Q: The half-life of strontium-90 is 28 years. H

A: Given t1/2 of a reaction is 28 years  decay constant  (λ) λ = 0.693t1/2     = 0.69328 y     =…

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

A: Radioactive disintegration follow first order kinetics

Q: Plutonium-239 (produced in breeder reactors has a half-life of 24,100 years. How long will it take…

A:

Q: The half-life of strontium-87 is 2.8 h. What percentage of this isotope will remain after 8 h and 24…

A: Radioactive decay is the breaking of unstable nuclei into stable ones by emitting radiation. These…

Q: Gold-198 has a half-life of approximately 3 days. if a 100 g sample of gold-198 decays for 9 days,…

A: The objective of this question is to determine the amount of Gold-198 that remains after a certain…

Q: Radium-223 decays with a half-life of 11.4 days.   How long will it take for a 0.240-molmol sample…

A:

Q: Isotope of uranium 234U decays to thorium by the alpha decay with the half-life of 7.73 x 1012 s.…

A:

Q: 30% of a radioactive substance has decayed after 10years, what is its half-life?

A:

Q: Iodine-131 has a half life of 2.2 × 10-2 year. How long will it take to reduce a 133 g sample of…

A: Half Life = t1/2 = 2.2 * 10-2 yeark t1/2 = ln (2)k * 2.2 * 10-2 year = 0.693k = 31.5 year-1

Q: NUCLEAR REACTIONS Zinc-62 decays with a half-life of 9.186 hours. 1. Write the balanced nuclear…

A: Answer: All nuclear reactions are first order reaction therefore integrated rate law of first order…

Q: The half-life of 223Ra is 11.4 days. How much of a 200.0 mg sample remains after 600 hours?

A:

Q: 7. What is the half-life of an unknown substance if it is observed to decay from 15 mg to 3.75 mg in…

A:

Q: Ra decays by the emission of B partides. The half-ife for the decay is 6.67 years. a. Write the…

A: Given : 22888Ra undergoes beta particles emission decay. And half life for decay = 6.67 years.

Q: 1. Phosphorous - 32 has a half - life of 14 days.  After how many days will a 1000 mg sample decay…

A:

Q: How many half lives will it take for 50 g of "Tc to decay to 6.25 g?

A: Half-life period was discovered by ernest Rutherford in 1907. Rutherford applied the principle of a…

Q: Magnesium-23 is a positron emitter with a half-life of 11.3039 min. How much of a 1.80-g sample of…

A: Radioactivity is a phenomenon in which nuclei of certain elements undergo spontaneous disintegration…

Q: It takes 32 days for 512 grams sample of element X to decay to final amount of 4grams. What is the…

A: We are asked to calculate the half-life of element X.

Q: Hydrogen-3 has a half-life of 12.3 years. How many years will it take for 890.0 mg 'H to decay to…

A:

Q: The half-life of sodium-24 is 15 hr. If a sample initially contains 40. g of sodium-24, how much…

A: Radioactive reactions are First order reactions. Half life of Sodium-24 is 15 hr. Initial…

Q: If 7.0 grams of a sample decays to 0.44 grams in 2.0 hours, what is the half-life time of the…

A: For calculation of half life first of all we need rate constant of the reaction, which can be…

Q: Americium-241 is a radioactive isotope that is used in smoke detectors. It has a half-life of 432.2…

A:

Q: 8. Radioactive Iodine-131, with a half-life of eight days, is a common fission product and thus is…

A: The expression for the first order radioactive decay is shown below: Where; t = time A0 = initial…

Q: Phosphorus-32 is a radioisotope. It is typically used as a tracer in biological research or to treat…

A: Given,Ordered sample of P32 = 950 mgTime required for shipping = 42.9 daysHalf-life of P32 = 14.3…

Q: NUCLEAR REACTIONS Zinc-62 decays with a half-life of 9.186 hours. 1. Write the balanced nuclear…

A:

Q: Radium-223 decays with a half-life of 11.4 days. How long will it take for a 0.240-molmol sample of…

A:

Q: Iodine-131 is used in the treatment of thyroid disease. What is the half-life of iodine-131 if a…

A: Weight of sample initially = 160mg Weight of sample finally = 5mg Time elapsed = 40 days We have to…

Q: 27) Rhenium 186 is a ß-emitter with a half-life of 90.0 hours. How long would it take for the…

A:

Q: The isotope 22288Rn has a half-life of 3.8 days. How long does it take for 0.050 mmol to decay to…

A:

Q: How long does it take a 11.1 : 108 Bq sample of gold- 198 to decay so that only 1.39 : 108 Bq…

A: Given: Initial amount, A0=11.1 : 108 Bq After the time 't', the amount, A= At=1.39 : 108 Bq

Q: If 28.0% of a sample of gallium-66 decays in 4.46 hours, what is the half-life of this isotope (in…

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Q: Radium 223 decays with a 1/2 life of 11.4 days. How one will it take for 0.240 mol sample of radium…

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Q: -137, a beta emitter has a half-life of 30 vears

A: Dear student I have given answer to your question in the image format.

Q: 3. What is the half-life of a 100.0 g sample of nitrogen-16 that decays to 12.5 g of nitrogen-16 in…

A: Given: Initial mass of nitrogen-16 (N0) = 100g Final mass of nitrogen-16 (N) = 12.5g Time (t) = 21.6…

Q: How long long does it take for 78 % of sample of cobalt-60 to decay (the half life is 5,26 years)?

A: The rate of a reaction is expressed as: Rate = k[A]n where k is the rate constant, [A] is the…

Q: 187 Cs has a half-life of 30.2 years. How many years will it take for a 100.0-g sample to decay to…

A: Half life means time takwen by the sample to reachhalf of its concentartion.  Remains afetr t time =…

Q: 13' Cs has a half-life of 30.2 years. How many years will it take for a 100.0-g sample to decay to…

A:

Q: a radioactive isotope. Z-109 has a half life off 43.1 years. how manny years Will it take the sample…

A:

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.