Radium decompose in air at the rate proportional to the amount present. If initially there 20 grams, and after 10 years, 0.6% of the original amount decompose, what is the half life of radium?

Q: The half-life of palladium-100 is four days. (So half of any given quantity will disintegrate in…

A: Let the initial mass of palladium-100 is m, it is given that mass will reduced to half in 4 days. so…

Q: 100mg sample of tritium-3 decayed to 94.5mg after a year. (i) What is the half-life of tritium-3?…

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Q: Find the half-life of a radioactive substance that decays by 4% in 3 years. (Round your answer to…

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Q: Radium disintegrates at a rate proportional to instantaneously present. If the half - life of…

A: Let the amount of Radium after t years be given by R(t). The rate of disintegration is dRdt.…

Q: Assume that radium disintegrates/decomposes at a rate proportional to the amount present. If 100 mg…

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Q: nitially 100 milligrams of a radioactive substance was present. After 6 hours the mass had decreased…

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Q: Strontium 90 (Sr-90), a radioactive isotope of strontium, is present in the fallout resulting from…

A: The answer is found in step-2

Q: Radium decompose in air at the rate proportional to the amount present. If initially there 20 grams,…

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Q: Strontium 90 (Sr-90), a radioactive isotope of strontium, is present in the fallout resulting from…

A: the amount decreases by (1/2)^nLwhere n is the number of half life yearsso ,(1/2)^n = 1/32solving…

Q: 1. Radium decomposes at a rate proportional to the amount present. In 100 yrs, 100 mg of radium…

A: Given that Radium decomposes at a rate proportional to the amount present. In 100 years, 100 mg of…

Q: Radon-222 has a half-life of 4.00 days. Given its mass 5.937 gram at a certain time, what was the…

A: We will find out the required value.

Q: How long will it take 70 grams of cobalt-60 to decay to 7 grams? The half-life of cobalt-60 is 5.3…

A: Given data is : Initial 70 gram of cobalt -60 A0=70 gram  Let after t years cobalt-60 decay to 7…

Q: After 15 years, one fourth of the initial mass of radioactive substance has decayed. a) Find the…

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Q: An unknown radioactive element decays into non- radioactive substances. In 240 days the…

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Q: Potassium-40, with a half-life of 1.25 billion years, has been used by geochronologists trying to…

A: Let 't' be the number of yearsLet 'x(t)' be the…

Q: Radium decomposes at a rate proportional to the amount at any instant. In 100 years, 100mg of radium…

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Q: An unknown radioactive element decays into non- radioactive substances. In 320 days the…

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Q: Radium decomposes at a rate proportional to the amount present at any instant. If initially there…

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Q: It is found that 0.5% of radium disappears in 12 years, a.) What percent will disappear in 100…

A: We have to find the half life of the radium

Q: An unknown radioactive element decays into non-radioactive substances. In 660 days the radioactivity…

A: According to the given information, an unknown radioactive element decays into non-radioactive…

Q: Radon-222 has a half-life of 4.00 days. Given its mass 3.055 gram at a certain time, what was the…

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Q: 4. The population of the world is expected to double in the next 30 yr. What is its growth rate?

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Q: Radium decomposes at a rate proportional to the amount present. In 100 years, 100 mg of radium is…

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Q: The half-life of carbon-14 is 5730 years. A frozen human mummy was discovered in a glacier. It was…

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Q: c. A certain radioactive material is known to decay at a rate proportional to the amount present. If…

A: let amount of material present at any time t be p(t) let p0 be the intial  amount of material at…

Q: Strontium-90 has a half-life of 29 years. If there are 400 grams of strontium initially, how much,…

A: Strontium-90 has a half-life of 29 years, there are 400 grams of strontium initially.

Q: Cobalt-60 has a half-life of 5.24 years. a. Find the mass that remains from a 100-mg sample after 20…

A: (a) Consider the mass remains from m0 mg sample after n years as m(t). The exponential equation can…

Q: An unknown radioactive element decays into non-radioactive substances. In 260 days the radioactivity…

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Q: A radioactive substance used in nuclear weapons decays at the rate of 3.2% per year. Calculate the…

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Q: A wooden artifact from an ancient tomb contains 20 percent of the carbon-14 that is present in…

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Q: An initial amount of 100 g of the radioactive isotope thorium-234 decays according to Q(t) =…

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Q: Radium decomposes at a rate proportional to the amount at any instant. In 100 years, 100 mg of…

A: Solution

Q: 40 grams of radioactive material decays to 35 grams in 20 years. Find the half-life.

A: In this question we need to find the half life of the given radioactive material

Q: Radium decomposes at the rate proportional to the present amount. If the half- life is 1600 years,…

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Q: A sample of radium has a weight of 1.5 mg and a half-life of approximately 6 years. How much of the…

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Q: Radium decomposes at a rate proportional to the amount present. If half the original amount…

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Q: An unknown radioactive element decays into non-radioactive substances. In 420 days the radioactivity…

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Q: The half-life of a radioactive substance is 160 years. a) Compute the decay constant k (4 decimal…

A: a)Half-Life of a radioactive substance is 160 years, Initial amount=300 g time, t=160 years,We know…

Q: A toxic radioactive substance in the amount of 7 miligrams per square centimeters is detected in the…

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Q: Radium has a weight of 1.5 and a half life of 6 years. What is its weight after 3 years?

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Q: Cesium-137 has a half-life of approximately 30 years. How much of a 40-gram sample would be left…

A: The exponential decay function is given by P = P0·ek·t where t = time in years P = the amount of…

Q: Strontium-90 is a radioactive isotope with a half-life of 29 years. Strontium-90 is a major…

A: The half-life , T12 , is calculated using the formula, T12=ln 2λ , where, λ is the decay constant.…

Q: Radioactive radium has a half-life of approximately 1599 years. The initial quantity is 15 grams.…

A: Given that a radio-active radium has a half-life of approximately 1599 years and initial quantity is…

Q: Radioactive Radium Radium-221 has a half-life of 30 s. How long will it take for 95% of a sample to…

A: For decay of radioactive element                 Half life = ln 2decay constant         t12  = ln 2λ…

Q: Radioactive radium has a half-life of approximately 1599 years. What percent of a given amount…

A: A(t)=A012thh is the half lifeA(t) is the amount after t years.A0 is the initial value.

Q: A sample of radium has a weight of 1.5mg and a half-life of approximately 6 years how much of the…

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Q: Strontium-90 has a half-life of 28 days.(a) A sample has a mass of 50 mg initially. Find a…

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Q: 22. The half-life of radium-226 is 1620 years. a) If the current mass of a sample is 100 grams, what…

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Q: The half life of a decaying substance is the amount of time it take for the substance to reduced to…

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Q: An unknown radioactive element decays into non-radioactive substances. In 840 days the radioactivity…

A: Given: An unknown radio active element decays into non-radio active substances. In 840 days the…

Q: An unknown radioactive element decays into non- radioactive substances. In 540 days the…

A: 1) The half life equation is P(t) = P (0)*(0.5)t/H   P(t) is the quantity at time t (proportional to…

Q: Radon-222 has a half-life of 4.00 days. Given its mass 3.168 gram at a certain time, what was the…

A: We will find out the required solution.