cl4 undergoes first order radioactive decay. For simplicity let its half-life be 6,000 years. The disintegration rate, measured as counts/sec by a radiation detector, is proportional to the amount of C1ª remaining. Suppose a sample which originally showed 8,000 counts/sec now shows 1000 counts/sec. What is the age of the sample? Note that you can't put a comma in your answer. years

cl4 undergoes first order radioactive decay. For simplicity let its half-life be 6,000 years. The disintegration rate, measured as counts/sec by a radiation detector, is proportional to the amount of C1ª remaining. Suppose a sample which originally showed 8,000 counts/sec now shows 1000 counts/sec. What is the age of the sample? Note that you can't put a comma in your answer. years

Chemistry

10th Edition

ISBN:9781305957404

Author:Steven S. Zumdahl, Susan A. Zumdahl, Donald J. DeCoste

Publisher:Steven S. Zumdahl, Susan A. Zumdahl, Donald J. DeCoste

Chapter1: Chemical Foundations

Section: Chapter Questions

Problem 1RQ: Define and explain the differences between the following terms. a. law and theory b. theory and...

See similar textbooks

Similar questions

Phosphorus-32 is a commonly used radioactive nuclide in biochemical research, particularly in studies of nucleic acids. The half-life of phosphorus-32 is 14.3 days. What mass of phosphorus-32, in milligrams, is left from an original sample of 175 mg of Na₃³²PO₄ after 35.5 days? Assume that the atomic mass of ³²P is 32.0.
Uranium-238 forms thorium-234 after radioactive decay and has a half-life of 4.5 x 10^9 years. How many years will it take to decay 75% of the initial amount?
The age of water samples or aqueous solutions can be determined by determining the radioactive tritium. Calculate the age of the cognac sample that had 10 times less radioactivity than the freshly prepared sample. The half-life of tritium is 12.5 years.
The radioisotope phosphorus-32 is used in tracers for measuring phosphorus uptake by plants. The half-life of phosphorus-32 is 14.3 days. If you begin with 33.8 mg of this isotope, what mass remains after 20.6 days have passed? mg
The half life for the radioactive decay of potassium-40 to argon-40 is 1.26 × 10⁹ years. Suppose nuclear chemical analysis shows that there is 0.303 mmol of argon-40 for every 1.000 mmol of potassium-40 in a certain sample of rock. Calculate the age of the rock. Round your answer to 2 significant digits. years □x₁0 X 5
The half life for the radioactive decay of potassium-40 to argon-40 is 1.26 x 10 years. Suppose nuclear chemical analysis shows that there is 0.374 mmol of argon-40 for every 1.000 mmol of potassium-40 in a certain sample of rock. Calculate the age of the rock. Round your answer to 2 significant digits. years
A radioisotope “X” has a half-life of 2.5 years. Determine (to the nearest 0.1 mg) how much of a 1000 mg sample of “X” remains after a period of 17.5 years.
I 3. All radioactive decay processes follow first-order kine - ics. What does this mean? What happens to the rate of radioactive decay as the number of nuclides is halved? Write the first-order rate 1 w and the integrated first order rate law. Define the terms in each equation. What is the half-life equation for radioactive decay processes? How does the half-life depend on how many nuclides are present? Are the half-life and rate constant k directly related or inversely related?
3. The isotope 212Bi has a half-life of 1.01 yr. What mass, in mg, of a 2.00 mg sample will remain after 3.75 x10³ hrs? a. First calculate the rate constant. b. Now use the initial mass to determine the mass after 3.75x10³ hrs.
The half life for the radioactive decay of rubidium-87 to strontium-87 is 4.88 × 100 years. Suppose nuclear chemical analysis shows that there is 0.455 mmol Of strontium-87 for every 1.000 mmol of rubidium-87 in a certain sample of rock. Calculate the age of the rock. Round your answer to 2 significant digits. O years x10
The 1st-order decay of a particular radioactive element has a half-life of 1.234 days. How many grams of radon remain after 5.67 days if the sample initially weighs 891.0 grams? Group of answer choices 307 508 36.9 0.815 76.3
what is the half-life of plutonium-239 if it takes 14 098 years for 33% of a given sample to decay?