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

The electron density between 1s and 2s orbital is, The electron density be...

The electron density between 1s and  2s orbital is : (1) High (2) Low (3) Zero (4)None of these Ans:Zero

S block, why do transition metals form complex salts

why do transition metals form complex salts

Conformation, Which one is most stable form of 1,3 Di tertiary butyl cycloh...

Which one is most stable form of 1,3 Di tertiary butyl cyclohexane?

Calculate the composition of the vapor and liquid, A flash separator "flash...

A flash separator "flashes" (abrupt increase in temperature and pressure) a liquid stream containing multiple species. Not all of the liquid vaporizes, but the vapor that does form

Discuss cohesive energy and electron affinity, Discuss "cohesive energy" an...

Discuss "cohesive energy" and "electron affinity". ‘Cohesive energy’:  In a chemical bond, it’s the energy required to dissociate a solid into isolated atoms or molecules as ap

S block elements.., lithium and beryllium markedly differ from other member...

lithium and beryllium markedly differ from other members of their respective groups.

An ion has 18 electrons in the outermost shell, An ion has 18 electrons in ...

An ion has 18 electrons in the outermost shell, it is: (1)  Cu +                (2) Th 4+                             (3) Cs +                       (4) K + Ans

What do you mean by isomers, Q. What do you mean by Isomers? Ans. ...

Q. What do you mean by Isomers? Ans. Compounds like butane and 2-methylpropane which have the same molecular formula but different molecular structures are called isomers

Westron.., explain industrial manufacturing process of westron

explain industrial manufacturing process of westron

Molarity and normality, When 100 ml of M/10 H2SO4 is mixed with 500 ml of M...

When 100 ml of M/10 H2SO4 is mixed with 500 ml of My/10 NaOH then nature of resulting solution and normality of excess reactant left is

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