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

Polymer, aromatic carboxylic acids

aromatic carboxylic acids

Meralargy, role of silica in cupper abstraction

role of silica in cupper abstraction

Which the following sets of quantum numbers is not allowed, Which of the fo...

Which of the following sets of quantum numbers is not allowed : (1) n=1, l=0,m=0 s= +1/2                   (2) n=1, l=1,m=0 s= -1/2              (3) n=2, l=1,m=1 s= +1/2

Determine uncertainty of velocity, Uncertainty in position of a 0.25 g par...

Uncertainty in position of a 0.25 g particle is 10 -5   . Uncertainty of velocity  ( h = 6.6 x 10 -34 Js) is: (1)  1.2 x 10 34       (2)  2.1 x 10 -29   (3)  1.6 x 1

Calculation of empirical formula, Calculation of empirical formula ...

Calculation of empirical formula The steps included in the calculation are as follows, (a) Divide the percentage (%) of each element by its atomic volume. This gives th

Identify equation to describe chemical process, Identify an equation that d...

Identify an equation that describes some chemical process.  Your equation should have at least two parameters, at least one of which should contribute in a non-linear way. Here

Organic, total metal in word

total metal in word

Redox reactions as a change in oxidation number, Q. How to change in Oxidat...

Q. How to change in Oxidation Number in Redox Reactions? Ans. In reduction-oxidation, or redox, reactions, atoms undergo changes in their oxidation numbers. Consider th

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