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

Chemical combinations, explain about law of chemical combinations in about ...

explain about law of chemical combinations in about 200 words?

Physical properties of formic acid, Physical properties of Formic Acid ...

Physical properties of Formic Acid (a) Formic Acid is a pungent smelling and colourless liquid. (b) Formic Acid melts at 8.4° C and boils at 100.5° C . (c) Formic Acid i

Define bond angle, The angle among the lines joining the nuclei of the bond...

The angle among the lines joining the nuclei of the bonded atom with a central atom is known as bond angle.

Exchange energy, #question.which configuration is more stable,p3 or p6

#question.which configuration is more stable,p3 or p6

The correct sets of the four quantum numbers 4d electron, Which of the fol...

Which of the following represents the correct sets of the four quantum numbers of a 4d  electron: (1)  4,3,2,1/2                        (2) 4, 2, 1, 0 (3)  4,3,-2+1/2

Write electron configuration for a neutral atom of silicon, Q. Write electr...

Q. Write electron configuration for a neutral atom of silicon? Writing Electron Configurations by means of Noble-Gas Notation Use noble-gas notation to write the electron confi

Transition elements, Why transition elements form interstitial compound

Why transition elements form interstitial compound

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