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

Explain rules of pericyclic, Explain rules of pericyclic The pericyclic...

Explain rules of pericyclic The pericyclic selection rules say absolutely nothing about the position of equilibrium in every case.  These rules refer to rates of reactions, not

Sources of errore in thermogravimetry, plz can you send me or give me data ...

plz can you send me or give me data about my assignment topic which is mentioned above in title.it consist of 5 pages and only 5 sources are discussed in detail

Chloroform or trichloromethane - organic chemistry, Chloroform or trichloro...

Chloroform or trichloromethane, CHCl 3 It is a significant trihalogen derivative of methane. It was given by Liebig in year 1831 and its name chloroform was proposed by Dumas

Ch3-chbr-ch2-chcl-ch3, CH 3 -CHBR-CH 2 -CHCL-CH 3 1     2        3      4...

CH 3 -CHBR-CH 2 -CHCL-CH 3 1     2        3      4    5       Br abd Cl are side chain. numbering is done so that the alphabet that comes first in order get lowest number i.e.,

Transition metal do not displace hydrogen from dilut acid, Most of the tran...

Most of the transition metal do not displace hydrogen from dilut acid. why? Ans) The activity series of transition metals is less than that of hydrogen so they can not displace h

Van der waals forces, what points should be included in an assignment on va...

what points should be included in an assignment on van der waals forces

What is alloys, Q. What is Alloys? Metals have a property of combining...

Q. What is Alloys? Metals have a property of combining with other metals to form alloys. An alloy may be defined as a solid which is formed by a combination of two or more met

Spectral lines are possible in its emission spectrum, If hydrogen atom is i...

If hydrogen atom is in an energy level represented by n=4,how many spectral lines are possible in its emission spectrum? Solution) There is a formula for this i.e  [ (n 2 - n 1

Concentration ore, how is the material extracted from concentrated ore?

how is the material extracted from concentrated ore?

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