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

Electron Configuration and Periodic Properties, what are the signs associat...

what are the signs associated with electron affinity?

Sesame oil, how to check the quality of sesame oil such as fat, nutrients, ...

how to check the quality of sesame oil such as fat, nutrients, etc.,?

Calculate the molar concentration, Calculate the molar concentration of the...

Calculate the molar concentration of the solution essential to obtain the value of 10 molecules per µm2. (For this calculation we suppose that the transfer of the dye molecules fro

Organic chemistry, what type of reaction takes place in synthesis of iodofo...

what type of reaction takes place in synthesis of iodoform from acetone by haloform reaction?

Determination of accuracy of volume marking on glassware, Determination of ...

Determination of accuracy of volume marking on glassware I. PURPOSE OF THE EXPERIMENT To become familiar with the laboratory environment and to acquire skills in accur

Aromatic carboxylic acids , what are the factors affecting the acidity of t...

what are the factors affecting the acidity of the aromatic carboxylic acids ?

Coordination compounds, what is the name of this complex [Br2Pt(S Me)2PtBr2...

what is the name of this complex [Br2Pt(S Me)2PtBr2] and what is the formula of this compound pentamminecrbonato cobalt(III) tetrathiocyanato-N-zincate(II)

What is thermal breakdown, What is Thermal breakdown It is because o...

What is Thermal breakdown It is because of the attainment of an excessive temperature in dielectric.  If  heat  dissipated  is  less  than  heat  generated,  there  is  a pr

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