< Question 11 of 15 > The half-life of radioactive chromium-51 is 28 days, If a sample of chromium-51 has a mass of 12.0 pug, calculate the number of days it will take for the mass to be reduced to 0.750 ug. time: days

Q: How many half‑lives of the unknown radioactive substance have occurred?

A: As we know that decay of radioactive substance follows first order kinetics

Q: Consider a radioactive sample with a half-life of one week. How much of the original sample will be…

A: Half-life period is defined as the time taken for amount of the sample to reduce to half of its…

Q: The half-life of Oxygen-14 is 1.177 minutes.  You originally have 20 grams of it.  After roughly 3.5…

A: Given: Half-life of Oxygen-14 is 1.177 minutes Mass of Oxygen-14 is 20 g

Q: A sample of a radioactive metal starts with a mass of 400 grams. When a chemist examines it later,…

A: 25 g of metal remains after 4 half-lives.

Q: Technicium-104 has a half-life of 18 minutes.If the initial mass is 100.0g,how much remains after 90…

A:

Q: A sample of Thorium-228 has a half life of 1.9116 years. what percent of thorium 228 remains after…

A: Let the initial amount be A0After the first half-life the amount remaining is

Q: If the amount of radioactive phosphous-32 in a sample decreases from 1.2 g to 0.30 g in 28.6 days,…

A:

Q: Selenium-73 decays by positron emission with a half-life of 7.15 hours. What mass remains from a…

A:

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: Tin-129 is radioactive and has a half life of 2.23 minutes. What percentage of a sample would be…

A: Answer:

Q: Iodine 1 31 has a half life of about 8 days.  In 40 days what percent of the original sample would…

A: Formula used :-  t1/2 = .693/k  Where k is rate constant. k = 2.303/t log [A0]/[A]

Q: Phosphorus-32 has a half-life of 14.0 days. Starting with 6.00 g of 32P, how many grams will remain…

A: Given: The half-life of phosphorus -32 =14.0 days i.e. t1/2=14.0 days Starting amount of P=6.00 g

Q: The isotope Bismuth-212 has a half life of 368.65 day. What mass in mg of a 2 mg sample will remain…

A: Half life of Bismuth, t1/2 = 368.65 days. Bismuth-212 is a radioactive element. Thus, it will follow…

Q: Iodine-125 has a half-life of 60.4 days and is used in radiation therapy to treat prostate cancer…

A: Since the decay reactions are first order reactions Hence we can say  1) Half life = ln(2) / K 2)…

Q: Mr. Albedo stumbled upon an unknown material in an abandoned laboratory. He believes that this…

A:

Q: Gold-198 has a half-life of 2.7 days. How much of a 344.7 mg gold-198 sample will remain after 13.5…

A: Given data: Half-life of Gold-198 (t1/2)= 2.7days Initial amount of Gold-198(A∘) = 344.7 mg Time for…

Q: Beginning with 100 g of iron-55, calculate how much remains after 7.7 years.  The half-life of…

A: The time taken during a reaction to reduce the concentration of a reactant to half of its initial…

Q: the Cs-131 by life has a half life of 30 years. after 120 years, 2.6 g remain. what is the original…

A:

Q: What mass of plutonium-240 will remain after 32,820 years if the initial sample contained 4.8 g of…

A: We know nuclear decay follows First order kinetics. we have to use the formula - t12=ln2K from this,…

Q: If half-life of carbon-14 is 5730 years, estimate the age of a bone containing 75% of its original…

A:

Q: Radium-221 has a half life of 30 seconds. How long will it take for 82% of a sample to decay?

A: Half life =30 seconds Decay percentage = 80%

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

A:

Q: The half-life of radioactive chromium-51 is 28 days. If a sample of chromium-51 has a mass of 12.0…

A: Given, Half Life , t1/2 = 28 days First, calculate rate constant ,K to calculate time (t)

Q: Half life iridium 192 is 106.51 days. How many days are required for 60 mg to decay to 7.5 mg

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Q: Based on Plutonium's half-life, why is it so hard to dispose of?

A: According to research,  Plutonium has two isotopes, Pu-239 and Pu-241.  Here, Plutonium-239 has a…

Q: alf-life of a radioactive substance is 3.8 hrs. After how many hours 30% of its original value…

A:

Q: The​ half-life of​ silicon-32 is 710 years. If 20 grams is present​ now, how much will be present…

A: Radioactive decay is always a first order reaction. The rate equation for the radioactive decay is :…

Q: A 604.7 ng sample of an unknown radioactive substance was placed in storage and its mass measured…

A:

Q: How much time is required to reduce a 1 kg sample to about 1 gram if the half life of cesium-137 is…

A:

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: For all of the remaining questions, show or describe your work. 3. The mass of a sample of a mystery…

A:

Q: The half-life of tritium is 12.4 years. How long will it take for 15% of a sample of tritium to…

A: The radioactive decays are first order reaction.

Q: Iron-59 is used to study iron metabolism in the spleen. Its half-life is 44 days. How many days…

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.