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

What are the de broglies waves, Q. What are the De Broglies waves? Bohr...

Q. What are the De Broglies waves? Bohr anticipated that hydrogen's single electron could orbit at only specific distances from the atom's nucleus. When the electron is in the

Inorganic chemistry, which is having more atomic size alkali metals or alka...

which is having more atomic size alkali metals or alkaline earth metals#Minimum

Briefly explain about alloys, Q. Briefly explain about Alloys? Ans. ...

Q. Briefly explain about Alloys? Ans. Pure metals are malleable. Metals that are harder, stronger and less malleable are sometimes required. These characteristics may be a

Nuclophilic substitution, solution A is made by dissolving sodium acetate i...

solution A is made by dissolving sodium acetate in methanol. so

Vulcanization of rubber - polymer, Vulcanization of rubber The procedur...

Vulcanization of rubber The procedure of heating natural rubber with sulphur to enhance its properties is known as vulcanization. Vulcanization was illustrated by Charles Goody

Synthetic rubber, Short note on synthetic rubber. S ol. Synthetic rubbe...

Short note on synthetic rubber. S ol. Synthetic rubber: main types of synthetic rubbers: 1.                 Styrene rubber: Buna-S; Bu-Butadiene; Na=sodium; = Styrene

P block elements, i want all the information of all the periods from 13th t...

i want all the information of all the periods from 13th to 18th present in p block element

BHC, structure and uses

structure and uses

Predominant phosphate species present in buffers solution, In lab, you're h...

In lab, you're having fun along with buffers based onto a 0.1 M solution of sodium phosphate at pH7.0.  Into this system, there are three of pK A s as:  12.7, 7.21 and 2.12.

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