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

Biochem, How is a peptide bond made through dehydration, and show it in a c...

How is a peptide bond made through dehydration, and show it in a chemical equation, please.

Quality of ghee, which parameters are analysed to confirm the quality of gh...

which parameters are analysed to confirm the quality of ghee and what are the values of tested parameters to indicate the quality grade?

Explain sources of antioxidants, Sources of antioxidants The primary bi...

Sources of antioxidants The primary biological role of antioxidant is in preventing the damage that reactive free radical can cause to cells and cellular compounds. In fact, al

Which category matches with ca(oh)2?, Which category matches with Ca(OH)2? ...

Which category matches with Ca(OH)2? - a. It is a Lewis acid. - b. It is a diprotic Br0nsted acid. - c. It is a salt. d. It is an Arrhenius base.

Chemical equations, why is it useful to use moles to measure chemical quant...

why is it useful to use moles to measure chemical quantities

Difference between mesomerism and resonance, Difference between Mesomerism ...

Difference between Mesomerism and Resonance Even though both resonance and mesomerism denote similar phenomenon, they are different in the following respect: Resonance inclu

Inorganic chemistry, dipole moment of para.nitro aniline is 6.10 D.why

dipole moment of para.nitro aniline is 6.10 D.why

The p-block elements, what are the chemical reactionsof the p-block element...

what are the chemical reactionsof the p-block elements

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