half life, Chemistry

Assignment Help:
A 64-g sample of germanium-66 is left undisturbed for 12.5 hours. At the end of that period, only 2.0 g remain. What is the half-life of this material?
4. With a half-life of 28.8 years, how long will it take for 1000 mg of strontium-90 to decay to 125mg?
5. Cobalt-60 has a half-life of 5.3 years. If a pellet that has been in storage for 26.5 years contains 14.5 g of cobalt-60, how much of this radioisotope was present when the pellet was put into storage?
6. A 1000 g block of phosphorus-32, which has a half-life of 14.3 days, is stored for 100.1 days. At the end of this period, how much phosphorus- 32 remains?

Related Discussions:- half life

P-orbitals of an atom in presence of magnetic, p-orbitals of an atom in pre...

p-orbitals of an atom in presence of magnetic field are: (1)  Two fold degenerate (2) Non degenerate (3) Three fold degenerate (4) None of these Ans: Non degenerate

Chemical properties of alkyl halides, Chemical Properties of Alkyl Halides ...

Chemical Properties of Alkyl Halides The alkyl halides are very reactive; the sequence of reactivity is as follow:             Iodide > Bromide > Chloride (Nature of the hal

Illustrate ionic bonds or electrovalent bond, Q. Illustrate Ionic Bonds or ...

Q. Illustrate Ionic Bonds or electrovalent bond? Ans. An ionic bond (also called an electrovalent bond) is the attraction between oppositely charged ions. Elements from o

Thermodynamics, Calculate the free energy change of following reaction at29...

Calculate the free energy change of following reaction at298 kelvin H2+I2=2HI if the enthalpy change is 51.8816kj and the entropy change is 166.15j is this reaction thermodyanamica

Explain heat of formation, Explain heat of formation Although both mole...

Explain heat of formation Although both molecules have bridgehead double bonds, the double bond in compound B is more twisted, and a model of this molecule is more complex to b

The nitride ion in lithium nitride is composed of, The nitride ion in lithi...

The nitride ion in lithium nitride is composed of: (1) 7 protons + 10 electrons     (2) 10 protons + 10 electrons   (3) 7 protons + 7 protons (4) 10 protons + 7 electr

Atomic spectroscopy, Atomic spectroscopy: Atomic spectroscopy is the o...

Atomic spectroscopy: Atomic spectroscopy is the oldest instrumental method of elemental analysis. The origin of these methods dates back to the times of Bunsen and Kirchhoff i

Properties of picric acid, Properties of Picric Acid Picric Acid is a y...

Properties of Picric Acid Picric Acid is a yellow crystalline solid, melting point 122°C. Picric Acid is insoluble in cold water but soluble in hot water and in ether. It is ac

Write Your Message!

Captcha
Free Assignment Quote

Assured A++ Grade

Get guaranteed satisfaction & time on delivery in every assignment order you paid with us! We ensure premium quality solution document along with free turntin report!

All rights reserved! Copyrights ©2019-2020 ExpertsMind IT Educational Pvt Ltd