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

Salt solution, A tank having 100 kg of a 60% brine (60% salt) is ?lled with...

A tank having 100 kg of a 60% brine (60% salt) is ?lled with a 10% salt solution at the rate of 10 kg/min and 78°F.Solution is detached from the tank at the rate of 15 kg/min.  Fin

You, one two three four get on the dance floor..

one two three four get on the dance floor..

Lubricant., Explain the mechanism of fluid film or hydrodynamic lubrication...

Explain the mechanism of fluid film or hydrodynamic lubrication.

How to calculate atomic mass of an element, Q. How to calculate atomic mass...

Q. How to calculate atomic mass of an element? Copper survive as a mixture of two isotopes. The lighter isotope (Cu-63) amid 29 protons and 34 neutrons makes up 69.17% of coppe

Basic organic chemistry, can you locate ortho,meta para positions on a benz...

can you locate ortho,meta para positions on a benzene ring

Electrodes, what types of electrodes use in physical chemistry

what types of electrodes use in physical chemistry

Organic chemistry, wive the most stable structure of hexene

wive the most stable structure of hexene

Silver salt method for acids - chemical methods, Silver salt method for aci...

Silver salt method for acids - Chemical methods It is based upon the fact that silver salt of an organic acid on heating provides residue of metallic silver.

Explain the liquid water aspect of using phase rule, Explain the Liquid Wat...

Explain the Liquid Water aspect of using phase rule? For a single phase of pure water, P equals 1. If we treat the water as the single species H 2 O, s is 1 and r is 0. The pha

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