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

What are the hydrocarbons, Hydrocarbons are compounds made completely out o...

Hydrocarbons are compounds made completely out of Hydrogen and Carbon.

Chemical formular, copper reacts with oxygen to form two oxide X and Y .On ...

copper reacts with oxygen to form two oxide X and Y .On analysis 1.535g of X yielded 1.365g of copper and 1.450g of Y yielded 1.160g of copper. [I] determine the chemical formula o

Project, what should a project contain

what should a project contain

Electron configuration, Prove that the number of orbitals in a principal qu...

Prove that the number of orbitals in a principal quantum level is n^2 using the fact that the number of orbitals in a subshell is (2L-1) where L is the azimuthal quantum number.

Maximum electrons in a d -orbital, Maximum electrons in a d -orbital are: ...

Maximum electrons in a d -orbital are: (1) 2        (2) 10        (3) 6      (4) 14 Ans: 10

What is hydrate isomerism, Q. What is Hydrate Isomerism? In a compound,...

Q. What is Hydrate Isomerism? In a compound, water molecules may be present in either coordinated form or as water of crystallisation In the former case water  molecules are di

Name the products obtained on complete hydrolysis of dna, Name the products...

Name the products obtained on complete hydrolysis of DNA. Enumerate the structural differences between DNA and RNA. In what way is a nucleotide dissimilar from a nucleoside?

Silver metal, what are the equations for Extraction of Ag from argentiferro...

what are the equations for Extraction of Ag from argentiferrous lead ?

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