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

Iupac, Chart of IUPAC NOMENCLATURE

Chart of IUPAC NOMENCLATURE

Ionic bonds, ionic bonds are usually formed by combination of elements with...

ionic bonds are usually formed by combination of elements with

Find the pressure in the droplet, Q. The pressure in a liquid droplet of ra...

Q. The pressure in a liquid droplet of radius r is greater than the pressure of the surrounding equilibrated gas phase by a quantity 2 =r, where is the surface tension. (a) Cons

D block elements , explain why Cu2+ ion is not stable in aqueous solution?

explain why Cu2+ ion is not stable in aqueous solution?

Chemical, What is the use of bhc

What is the use of bhc

Which of the following configuration is correct for iron, Which of the foll...

Which of the following configuration is correct for iron : (1) 1s 2 , 2s 2, 2p 6 , 3s 2 , 3p 6 ,, 3d 5    (2) 1s 2 , 2s 2 , 2p 6 , 3s 2 ,3p 6 , 4s 2 , 3d 5            (3)

Solid state, How does crystallography help in study of crystal structure

How does crystallography help in study of crystal structure

Methods of showing concentrations of solutions, Methods of showing concentr...

Methods of showing concentrations of solutions The concentration of a solution can be provided in various ways. (A) Percent by mass (B) Molarity (C) molality (D) Mo

Moles, How many moles of O2 are produced when 0.400 mol of KO2 reacts in th...

How many moles of O2 are produced when 0.400 mol of KO2 reacts in this fashion? 4KO2+2CO2 ----> 2K2CO3+3O2

Explain combined gas law, Q. Explain Combined Gas Law? Ans. The  ...

Q. Explain Combined Gas Law? Ans. The  combined gas law  combines Boyle's law and Charles' law. The combined gas law describes situations where a gas undergoes simul

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