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 pauli exclusion principle, Q. Explain Pauli Exclusion Principle? ...

Q. Explain Pauli Exclusion Principle? When assigning electron configurations, it is essential to consider the two important principles concerning electrons in orbitals:

Name the most basic amino acid, Name the most basic amino acid a) The m...

Name the most basic amino acid a) The most basic amino acid is arginine.  It has the highest isoelectric point. b) Glycine is not chiral and therefore it cannot be optically

General arrangement of physical elements of a galvanic cell, Define the Gen...

Define the General Arrangement of Physical Elements of a Galvanic cell? The general arrangement of the physical elements of a galvanic cell is therefore Terminal - electron

What is base units, Q. What is Base units? There are seven base units g...

Q. What is Base units? There are seven base units given in SI. A base unit is a unit of calculate that is based on an object or event in the physical world. Lists of the seve

Iso-electronic species is, Iso-electronic species is: (1) F - ,O -2   ...

Iso-electronic species is: (1) F - ,O -2              (2) F - , O                (3)  F - , O +                           (4) F - , O +2 Ans:  F - ,O- 2

What is spontaneous reactions, Q. What is Spontaneous reactions? Ans. ...

Q. What is Spontaneous reactions? Ans. Spontaneous reactions can occur under specific conditions without any assistance. Most of the reactions you know are spontaneous r

Show crystal field splitting in square planar complexes, Q. Show Crystal Fi...

Q. Show Crystal Field Splitting in Square Planar Complexes? In a d 1 or d 2 system the electrons will always go in the 'e' set of orbitals with the release of corresponding a

Chlorobenzene, Formation of aniline from chlorobenzene

Formation of aniline from chlorobenzene

Does ph affect the enzyme activity, The concentration of hydrogen ions in s...

The concentration of hydrogen ions in solution affects the enzyme activity. Every enzyme has maximal efficiency under an optimum pH. As pH is one of the factors for the denatura

Qualitative analysis, why do we add HCl in common ion effect of II froup

why do we add HCl in common ion effect of II froup

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