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

Chemisty, i need help finding information with the element sodium

i need help finding information with the element sodium

hydrogen peroxide, how is hydrogen peroxide storage in equatorial places (...

how is hydrogen peroxide storage in equatorial places (phil)? should it require 2-8 deg C? or ambient room? any special cabinets or equipment sof storing?

Soaps, why do soap not work in hard water ?

why do soap not work in hard water ?

#title., biography on Cecil E Boord

biography on Cecil E Boord

Correct relationship between wavelength momentum of particle, Which is the ...

Which is the correct relationship between wavelength and momentum of particles: (1) γ= h/ p                  (2) Π h/ p    (3) p= h/ γ (4) h= p/ γ Ans: γ= h/ p

Experimental research, how to write research design in experimental researc...

how to write research design in experimental research

Molality and molarity, the density of 2 molal aqueous solution of NaOH is 1...

the density of 2 molal aqueous solution of NaOH is 1.10g/L. Calculate the molarity of the solution.

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