Carbon 14 dating The technique of carbon 14 (4C) datingis used to determine the age of archaeological and geologi-cal specimens. The formula T = -8310 In x is sometimesused to predict the age T (in years) of a bone fossil, where xis the percentage (expressed as a decimal) of 14C still pres-ent in the fossil.(a) Estimate the age of a bone fossil that contains 4% ofthe 14C found in an equal amount of carbon in present-day bone.(b) Approximate the percentage of "C present in a fossilthat is 10,000 years old.

For determination of age the formula used in carbon dating of fossil is: T=-8310 ln(x)Where:…

Answered: Carbon 14 dating The technique of…

Fundamentals Of Analytical Chemistry

9th Edition

ISBN:9781285640686

Author:Skoog

Publisher:Skoog

Chapter7: Statistical Data Treatment And Evaluation

Section: Chapter Questions

Problem 7.12QAP

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A large freshwater (total mass of water 10^5 kg) lake contains no lithium. A sudden spill releases a constant lithium contaminated flow discharging 3.98*10^8 mg of lithium/hr. How long will it take until the lake reaches a lithium concentration of 1.1nmol/kg?
Dinitrogen monoxide (N₂O; nitrous oxide) is a greenhousegas that enters the atmosphere principally from natural fertilize rbreakdown. Some studies have shown that the isotope ratios of ¹⁵N to ¹⁴N and of ¹⁸O to ¹⁶O in N₂O depend on the source, which can thus be determined by measuring the relative abundance ofmolecular masses in a sample of N₂O.(a) What different molecular masses are possible for N₂O?(b) The percent abundance of ¹⁴N is 99.6%, and that of ¹⁶O is 99.8%. Which molecular mass of N₂O is least common, andwhich is most common?
c. Plutonium-238 is used in spacecraft to provide heat to power generators. One of thesegenerators contained 765 g of plutonium-238 when it was manufactured. Given that thehalf-life of plutonium-238 is 87.7 years, calculate the mass of plutonium-238 remainingafter 350.0 years.
Consider the accompanying diagram. Ball A is allowed to fall and strike ball B. Assume that all of ball As energy is transferred to ball B at point I, and that there is no loss of energy to other sources. What is the kinetic energy and the potential energy of ball B at point II? The potential energy is given by PE = mgz, where m is the mass in kilograms, g is the gravitational constant (9.81 m/s2), and z is the distance in meters.
Radiation exposure to human beings is usually given in rems (radiation equivalent for man). In SI units, the exposure is measured in sieverts (Sv). One rem equals 0.0100 Sv. At one time, the exposure due to the nuclear reactors in Japan wras measured to be 8217 mSv/h. How many rems would a person exposed to the radiation for 35 min have absorbed? If one mammogram gives off 0.30 rems, how many mammograms would that exposure be equivalent to?
A helium-filled balloon spontaneously deflates overnight as He atoms diffuse through the wall of the balloon. Describe the redistribution of matter and/or energy that accompanies this process.
What is the mass of a golf ball traveling at 74.6 m s-1? The rest mass of a golf ball is 45.9 g, as regulated by the United States Golf Association.
Fe ves at the ie = 0-225 Vo Por Cord. amber 4 in Ceram IC Cpt oe tiide e eT. ue ae
Strontium-90 is a radioactive material that decays according to the function A(t)=A0e−0.0244t, where A0 is the initial amount present and A is the amount present at time t (in years). Assume that a scientist has a sample of 500 grams ofstrontium-90. (a) What is the decay rate of strontium-90? (b) How much strontium-90 is left after 40years? (c) When will only 300 grams of strontium-90 be left? (d) What is the half-life of strontium-90?
Plutonium-238 is used in spacecraft to provide heat to power generators. One of thesegenerators contained 765 g of plutonium-238 when it was manufactured. Given that thehalf-life of plutonium-238 is 87.7 years, calculate the mass of plutonium-238 remainingafter 350.0 years.
For intitial radioactivity, 1 is the highest and 4 is the lowest
Would you help me whit this example (6) Thank you.

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