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

The magnetic quantum number for valency electrons of sodium, The magnetic q...

The magnetic quantum number for valency electrons of sodium is: (1) 3        (2) 2         (3) 1       (4) 0 Ans: 0

What are metal carbonyls and its classifications?, Metal carbonyls of trans...

Metal carbonyls of transition elements constitute another important class of organometallic compounds. All d-block elements which contain only carbonyl ligands are called homolepti

What is chlorophyll, Q. What is chlorophyll? A magnesium complex of por...

Q. What is chlorophyll? A magnesium complex of porphyrin is called chlotophyll. the green colouring material in plants and which is essential  for photosynthesis. Hemoglobin

Salts with neutralization reactions, Q. Give neutralization reactions of sa...

Q. Give neutralization reactions of salts? Ans. A salt is an ionic compound composed of an anion from an acid and a cation from a base. Sodium chloride, NaCl, and potassiu

Atoms.., how do i draw an atom amd label it''s components

how do i draw an atom amd label it''s components

Compton effect, What are the significance of compton effect

What are the significance of compton effect

Detemine energy of atomic orbitals, Energy of atomic orbitals in a particul...

Energy of atomic orbitals in a particular shell is in the order: (1) s (2) s> p > d > f        (3) p (4)  f > d > s >p Ans:  s

Physical and derived quantities, 1. Discuss how such discoveries, technolog...

1. Discuss how such discoveries, technological advancement and breakthroughs were achieved and the person behind this advancement, it can be local or international. 2. List the ma

Important applications of indium, Q. Important applications of indium? ...

Q. Important applications of indium? The most important applications of indium are in protection of bearings against wear and erosion in low melting alloys and in electronic de

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