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

Physical change and chemical change, what are the similarities of chemical ...

what are the similarities of chemical and physical change

Predominant phosphate species present in buffers solution, In lab, you're h...

In lab, you're having fun along with buffers based onto a 0.1 M solution of sodium phosphate at pH7.0.  Into this system, there are three of pK A s as:  12.7, 7.21 and 2.12.

Glucose is soluble in water but cyclohexane is not.why?, Glucose and Sucros...

Glucose and Sucrose are soluble in water because they are polar compounds.SO they are soluble in polar compounds like water. Cyclohexane and Benzene are non polar compounds.They ar

Terminologies in organic chemistry!, (a) Co-ordination compound A co-ordi...

(a) Co-ordination compound A co-ordination compound contains a central metal atom or cation which is surrounded by a suitable number of anions or neutral molecules and usually re

Merits of atomic fluorescence spectrometry technique, Merits of atomic fluo...

Merits of atomic fluorescence spectrometry technique: The merit of the AFS methods lies within the greater sensitivity achievable because of low background and interference.

Isoelectronic species are, Isoelectronic species are: (1) K + Cl -    ...

Isoelectronic species are: (1) K + Cl -                               (2) Na + Cl -             (3) Na Ar                  (4) Na + Ar Ans:  K + Cl -

P block element, describe the comparative study of physical and chemical pr...

describe the comparative study of physical and chemical properties of p block elements.

Physical properties of dihydric alcohols, Physical properties of Dihydric a...

Physical properties of Dihydric alcohols (a) Dihydric alcohols is a colourless, syrupy liquid and sweet in taste.  Its boiling point is 197°C. (b) Dihydric alcohols is misci

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