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

Reaction involving cleavage of with removal of h as proton, Reaction involv...

Reaction involving cleavage of with removal of 'H' as proton Alcohols are stronger acids as compared to terminal acetylene but are not acidic enough to react along with aqueous

Assignment, Discuss hartree-fock self consistent field theory . what are it...

Discuss hartree-fock self consistent field theory . what are its demerit.

Zone refining process, how can we refine metal by zone refining process

how can we refine metal by zone refining process

Akenes and alkynes, what is the properties of alkenes and alkynes

what is the properties of alkenes and alkynes

Bohr''s orbit of an atom is given by the expression, The energy of an elect...

The energy of an electron revolving in n th   Bohr's orbit of an atom is given by the expression; (1) E n = 2Π 2 me 2 z 2 /n 2 h 2                       (2) E n = 2Π 2 m

Acidity, Why alcoholic acidity of maids is expressed as H2SO4?

Why alcoholic acidity of maids is expressed as H2SO4?

The number of quantum numbers required describe an electron, The number of ...

The number of quantum numbers required to describe an electron in an atom completely is: (1) 1          (2) 2         (3) 3     (4) 4 Ans: 4

Properties, what are the physical properties of acetic acid?

what are the physical properties of acetic acid?

Packing of atoms, how can i make an assignment on this topic

how can i make an assignment on this topic

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