One of the radioactive isotopes used in chemical and medical research is iodine-125, which has a half-life of 61 days. How long would it take for 0.25 g to remain of a 1.00 g sample of iodine-125? A) 244 days B) 122 days C) 61 days D) 31 days

Q: If you accidentally spill phosphorus-32 onto your shoe, how long would it take before 99.9% of the…

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Q: Thorium-234 has a half-life of 24.1 days. Suppose the initial amount of Thorium-234 is 162.9 mg,…

A: All natural and artificial radioactive decays follows first order kinetics The integrated rate…

Q: Lead-210 has a half-life of 22.3 years.   a) How much of a 102-mg sample would be remaining after…

A: Half life period is given by t1/2=0.693k Where, k is rate constant.

Q: 7) The half life of silicon is 710 years. 40 grams are present now, how much will be present in 200…

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Q: If 10 mg of iodine 131 is given to a patient, how much is left after 24 days? The half-life of…

A: Given : Half life of I-131 = 8 days Initial amount of I-131 = 10 mg And time passed = 24 days

Q: 2Tritium H-3 has a half-life of 12.3 years. If a sample of 3 g of H-3 is produced, what will be the…

A: The radioactive decay of a substance is a first-order reaction. During this process, a heavy metal…

Q: A 2.5 g sample of an isotope of Strontium-90 was formed in 1960 explosion of an atomic bomb at…

A: A numerical problem based on half-life period, which is to be accomplished.

Q: Moonrock collected by a US Apollo mission is estimated to be 4.30 billion years old by uranium/ lead…

A:

Q: Complete the table for the radioactive isotope. Isotope 239 Pu, Half Life (In years) 24100, Initial…

A: The amount of time required by an element to reduce to half its quantity is called its half-life.

Q: An 39 g sample of an isotope of Strontium-90 was formed in 1960 explosion of an atomic bomb at…

A:

Q: 1 A radioisotope has a half life of 4 days. How much of a 20-gram sample of this radioisotope…

A:

Q: 1. A 1 kg mass of radioactive material was left to decay in a laboratory. After 12 years, the…

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Q: 32) The charcoal from ashes found in a cave gave 3.34 14C counts per gram per minute. Wood from the…

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Q: 2) If 20.0 g of a radioactive isotope are present at 1:00 PM and 5.0 g remain at 2:00 PM, what is…

A: Since you have asked multiple question, we will solve the first question for you. If you want any…

Q: Iodine-131 has half life of 9 days meaning that after every 9 days the amount of isotope is reduced…

A: The half-life of Iodine-131 is 9 days. Initial amount =10.0 g  Time = 18 days. 18 days means => 9…

Q: The beta decay of cesium-137 has a half-life of 30.0 years. How many years must pass to reduce a 25…

A: We have given that The beta decay of cesium-137 has a half-life of 30.0 years. How many years must…

Q: Iodine-131 has a half-life of 8.04 days. If you begin with 2.7 mg of radioactive "I what mass…

A: Half-Life: The half-life of a radio active material will tell us the time it takes for one-half of…

Q: days. Suppose the initial amount of Thorium-234 is 192.9 mg, find the amount of Thorium-234 remains…

A:

Q: The half life of radium 226 is 1602 years. If you have 500 grams of radium today how many grams…

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Q: A moon rock collected by a U.S. Apollo mission is estimated to be 3.80 billion years old by…

A:

Q: A 2.5 gram sample of an isotope of strontium-90 was formed in a 1960 explosion of an atomic bomb at…

A: GIVEN:  To Find: Solution: As we know, For First order decay

Q: A solution of sodium iodine containing the radioactive isotope Iodine-131 was given to a patient. If…

A:

Q: A moon rock collected by a U.S. Apollo mission is estimated to be 3.70 billion years old by…

A: Calculate the value of rate constant (k):

Q: 1. If gallium - 68 has a half-life of 68.3 minutes, how much of a 160.0 mg sample is left after 1…

A: One half life is that time in which half of the radioactive substance gets decayed.

Q: Radioactive Radon-222 gas (222Rn) occurs naturally as a product of uranium decay. The half-life of…

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Q: An 22 g sample of an isotope of Strontium-90 was formed in 1960 explosion of an atomic bomb at…

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Q: 2P is a radioactive isotope with a half-life of 14.3 days. If you currently have 13.5 g of ²P, how…

A: The given data contains, t1/2 =14.3 daysPt=13.5 gP0=7 days

Q: Element X has a half life of 9 days and decays into element Y. How much element Y is created after…

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Q: A moon rock collected by a U.S. Apollo mission is estimated to be 4.00 billion years old by…

A:

Q: A moon rock collected by a U.S. Apollo mission is estimated to be 3.50 billion years old by…

A: Given : Time = 3.50 billion years old. Mass of uranium-238 = 1.540g Half life = 4.47 x 109 years

Q: The radioactive isotope Ga decays by electron capture. If the mass of a sample of gallium-67 decays…

A: According to the integrated rate law for the first-order reaction, the concentration of reactant is…

Q: Thallium-208 has a half-life of 3 minutes. How long will it take 120 g of thallium-208 to decay so…

A: Chemical kinetics is the study of the reaction that how fast or slow a reaction is taking place. The…

Q: Plutonium-239 has a half life of 2.41x10* yr. If you have a 10.0 mg sample how much will remain…

A: The time where any substance/element gets remained just half of its actual quantity is considered as…

Q: A moon rock collected by a U.S. Apollo mission is estimated to be 4.00 billion years old by…

A: Given: Half life of U235 , t1/2= 4.47x 109 yrsPresent time, t= 4.00 x 109 yrs mass of U238 = 1.430g

Q: 0 Question 9 180pb has a half-life of 25.5 s. If a sample of this isotope is initially 750.0 g, what…

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Q: Technetium-99 which has a half life of 6 hours is a useful isotope in diagnostic tests. If a patient…

A:

Q: Tritium H-3 has a half-life of 12.3 years. If a sample of 3 g of H-3 is produced, what will be the…

A: Given: Amount of tritium taken originally=3g Half life=12.3 years Total time taken=24.6 years Mass…

Q: The half life of radium-226 is 1600 years. How many grams of a 0.25g sample will remain after 4800…

A: After decying the nucleus it emits radiation of electromagnetic rays ,of certain Wavelength.

Q: A solution of sodium iodine containing the radioactive isotope lodine-131 was given to a patient. If…

A: These radioactive decay reactions are the first order reactions . In these type of reactions , rate…

Q: Technetium-99 which has a half life of 6 hours is a useful isotope in diagnostic tests. If a patient…

A:

Q: a. i. The half-life of 20 kg of Bismuth -210 is 20 minutes. Explain this statement? ii. A…

A: The half-life of 20 kg of Bismuth -210 is 20 minutes means after every 20mints the concentration of…

Q: In a 3×109 -year-old rock that originally contained some 238U , which has a half-life of 4.5×109…

A: Since 238U has a half-life of 4.5 × 109 y, it is useful for dating only very old materials, showing,…

Q: Sr-90 has a half-life of 28.8 years. Beginning with 15.0 of Sr-90, how much will remain after 145…

A: Determination of rate constant, K:

Q: A radioactive iodine sample has a half life of 6 days. If the original sample is 24 grams, how much…

A:

Q: Technetium-99m is an important isotope used in medical imaging (the m stands for metastable).  Each…

A: The time required to reduce the concentration to half of the initial concentration of the substance…

Q: Strontium-90 has a half life of 28 years. If a 5.31 mg sample was stored for 112 years, what mass of…

A: Reaction in which rate is linearly depend upon one reactant is known as first order reaction.

Q: A moon rock collected by a U.S. Apollo mission is estimated to be 4.10 billion years old by…

A: Concept:  Radioactive decay: It is the process by which an unstable atomic nucleus loses energy by…

Q: 1. Gold-191 has a half life of 12.4 hours. What mass of this isotope would remain after 49.6 hours…

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.