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 is point imperfection, Point imperfection: They are imperfect point-l...

Point imperfection: They are imperfect point-like regions in the crystal. One or two atomic diameters are the typical size of a point imperfection. A substitution impurity and an

Special topics in analytical chem, using a diagram explain how a fluorescen...

using a diagram explain how a fluorescence detector optical bench works

Organic, A crucial step in the Robinson annelation is the elimation of an a...

A crucial step in the Robinson annelation is the elimation of an aldol adduct to form an enone. The elimination of an aldol product can occur in base (it occurs even more readily i

What are changes in matter, Q. What are Changes in Matter? Matter is ab...

Q. What are Changes in Matter? Matter is able to undergo two fundamental kinds of changes. Changes that don't alter the composition of matter are called physical changes. Sta

Find the amount of recycle per hour, Acetic acid (HAc) is generated by the ...

Acetic acid (HAc) is generated by the addition of 10% excess sulfuric acid to calcium acetate (Ca(Ac) 2 ) (stream 1 compared to stream 3).  The flow diagram is shown below.

Caulometry and electrogravime, Askccomparison between caulometry and electr...

Askccomparison between caulometry and electrogravimetry question #Minimum 100 words accepted#

Which reactions can occur during further oxidation, a) Write down the balan...

a) Write down the balanced reaction equation of the key reaction path.  b) Which reactions can occur during further oxidation (except total oxidation) ?   The us

Amperometry, What practical applications does amperometry have? may I get e...

What practical applications does amperometry have? may I get elaborated answers supported by relevant examples?

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