A lab technician had 32 grams of a radioactive substance. Six hours later, only 30 grams remained. Find the half-life of the radioactive substance. (Round your answer to one decimal place.)

Q: Carbon-14 measurements on the linen wrappings from the Book of Isaiah on the Dead Sea Scrolls…

A: Given in the question, 79.5% of the carbon-14 is found in living tissue. Half life of C-14 = 5730…

Q: Carbon-14 has a half-life of 5730 yr. The decay rate of 14C in fresh wood is 13.6 counts per minute…

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Q: Skeletal remains had lost 85%of the C-14 they originally contained. Determine the approximate age…

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Q: A radioactive sample contains 1.55 g of an isotope with a halflife of 3.8 days. What mass of the…

A: Given details, t1/2 = 3.8 days t = 5.5 days m0 = 1.55 g To calculate the mass of the isotope. By…

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A: Radioactive decay of material follows first order kinetics.  Half life is defined as the time…

Q: 25. Iodine-131 is a radioactive substance that can be used to treat certain thyroid conditions. It…

A: Q25) Given that: Half life = 8 days Mass of Iodine = 40 mg Remain after 4 half lives = ?

Q: The radioactive element carbon-14 has a half-life of 5750 years. A scientist determined that the…

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Q: If you start with 71.0 grams of a radioactive substance with a half life of 3 days, how much will be…

A: Here given, Initial amount (N0) = 71 grams Half life (t1/2) = 3 days Time (t) = 15 days Amount left…

Q: The bacteria in some foods are sterilized by placing the food near a source of 1onizing radiation.…

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Q: In a dusty corner of a spooky abandoned lab, you find a vial labeled “70g of iron-55”.  You weigh…

A: Welcome to bartleby !  We have to calculate time required

Q: A sample contains 4 grams of carbon (half life 5730 years). How much carbon will remain after 1500…

A: The mass of the sample is = 4 gram The half-life of carbon is = 5730 years The amount of the sample…

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

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Q: Explain how a nuclear fission reaction can be controlled to produce heat for power…

A: A radioactive decay process or a nuclear reaction is known as nuclear fission.

Q: pile of radioactive material with a half-life of 10 years needs to sit until 0.0039 of the original…

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Q: Phosphorus-32 is radioactive and has a half life of 14.3 days. How long would it take a sample to…

A: Ans

Q: If you are given a sample of 14 g of a radioactive substance and waited for 4 half-lives to pass,…

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Q: A substance has a half-life of 26 years. presently, if there are 6293 grams of the said substance,…

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Q: Look at the figure below. In the mineral specimen represented here, radioactive parent atoms (red)…

A: HALF- LIFE PERIOD: In radioactivity, half- life period is defined as the time period required for a…

Q: (Simplify your answers. Do not round until the final answers. Then round to four decimal places as…

A: All radioactive decays are first order reaction. The half-life of first order reaction is given by,…

Q: A researcher claims that an ancient scroll originated from Greek scholars in about 500 B.C. Its…

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Q: Using the diagrams below, label the nuclear process as alpha, beta, or gamma radiation. Explain how…

A: Nuclear reactions are a type of chemical process which leads to the formation of some new nuclei…

Q: If a rock containing U-238 initially reads 36.4 counts per minute on a Geiger counter, what will its…

A: Given: Initial activity = 36.4 counts per minute

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

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Q: Using the diagrams below, label the nuclear process as fission or fusion. Explain how you identified…

A: We have given the nuclear process in above diagram and we have to predict whether it is nuclear…

Q: 26. Four hundred grams of a radioactive substance decays to 50.0 grams. If it has a half-life of…

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Q: Use the graph below to answer the following questions. Assume one atom produces one count per…

A: NOTE: Since you have posted a question with multiple sub-parts, we will solve first three subparts…

Q: At a certain instant, 100 grams of radioactive substance is present. After 20 years, 99.76 grams…

A: The half-life is the time required to change the initial amount to half of the amount. It is denoted…

Q: 48. If the decrease between 18 and 24 years in mass of radioactive matter is 4g, find its initial…

A: Radioactive decay follows first order kinetics.  We know that : k = 0.693/t(0.5) ...(1) k = rate…

Q: Use the graph in the figure below to find the half-life of isotope A. All you need is a sound…

A: The time at which half of the initial amount of a radioactive material decays is known as the…

Q: Suppose the amount of a certain radioactive substance in a sample decays from 3.60 mg to 2.50 mg…

A: Given  Initial amount ( A0 )   = 3.60 mg  Remaining amount ( At ) = 2.50 mg  Time ( t ) = 51.2…

Q: This exercise uses the radioactive decay model. A wooden artifact from an ancient tomb contains 80%…

A: The wooden artifact has 80% of the carbon-14 that is present in a living tree. The age of the…

Q: Phosphorus-32 Original amount: 30.0 g Amount left: Total time: 114.5 d Half-life: 14.3 d Number of…

A: We can determine the solution by the following formula : t = 2.303k log NoNk = 0.693thalf Where t =…

Q: Cobalt-60 is radioactive and has a half life of 5.26 years. What percentage of a sample would be…

A: For the reaction - A   +     B      →      C     +      D Rate = KAnBm where n and m are order of A…

Q: If 20% of the radioactive substance disappears in one year, find its half-life assuming exponential…

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Q: Carbon-14 has a half-life of 5730 yr. The decay rate of 14C in fresh wood is 13.6 counts per minute…

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Q: A 180.9 ng sample of an unknown radioactive substance was placed in storage and its mass measured…

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Q: The radioactive decay of Cs-137 is displayed in the plot below. 100 90 80 70 60 50 40 30 20 10 20…

A: We have to calculate  A. Half life  B.mass left  C. Percentage of original sample left

Q: Phosphorus-32 has a half-life of 14.0 days. Starting with 8.00 g of 32P, how many grams will remain…

A: Given Initial amount (N०) = 8.00 g Half life (t1/2) = 14 days time (t) = 42 days

Q: bromine-88 is radioactive and has a half life of 16.3 seconds. how long would it take a sample to…

A: Given , Bromine -88 t1/2= 16.3 s initial mass of sample ,Ca0=5.60 mg=5.6×10-3g final mass of sample,…

Q: Intercomver ting Jodine-125 is radioactive and has a half life of 60.25 days. How much of a 5.60 mg…

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Q: A chemist determines that a sample of petrified wood has a carbon-14 decay rate of 6.00 counts per…

A: Record the given data, Initial Carbon-14, No = 13.6 CPM per gram Nt = 6.00 CMP per gram Half-life t…

Q: The half-life of a given radioactive substance is 2.5 minutes. What fraction of the original…

A: Given, half-life , t1/2 = 2.5 min                     and, t = 10 min We need to calculate the…

Q: 12. A year ago there were 4 grams of a radioactive substance. Now there are 3 grams. How much was…

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Q: radioactive isotope has a half-life of 38.4 days. What percent of the original sample remains after…

A: The unstable nuclei or unstable isotope undergoes radioactive disintegration to form stable nuclei.…

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: Define the term half-life and illustrate it with an example.

A: The rate of the reaction is referred to the change in the molar concentration in the distinct…

Q: Radon is a naturally occurring, colorless, odorless, tasteless radioactive gas. Radon can build up…

A: Radioactive decay refers to the breakdown of an unstable nucleus to a stable nucleus with the…

Q: 5. Your objective in this activity is to create a line graph that will show the radioactive decay of…

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Q: The remains of Oetzi the Iceman were discovered near the border of Austria and Italy in 1991.…

A: A decay process of a nucleus occurs via first-order kinetic. The rate constant for the carbon-14…