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

Vulcanization of rubber - polymer, Vulcanization of rubber The procedur...

Vulcanization of rubber The procedure of heating natural rubber with sulphur to enhance its properties is known as vulcanization. Vulcanization was illustrated by Charles Goody

Help, how much atp energy (kcal) is produced in our bodies from the convers...

how much atp energy (kcal) is produced in our bodies from the conversion of 100.0 moles of sucrose?

Electrochemical cells, ELECTROCHEMICAL CELLS Galvanic and electrolytic...

ELECTROCHEMICAL CELLS Galvanic and electrolytic cells: The difference between potential of the two metals results in a potential difference (also called a electromotive fo

Face centred unti cell, Solid xenon forms crystals with a face centered uni...

Solid xenon forms crystals with a face centered unit cell that has an edge of 620  pm. 1. calculate the atomic radius of xenon. 2. calculate the packing efficiency if xenon.   So

Determine the moisture content in flour, Q. Determine the moisture content ...

Q. Determine the moisture content in flour? After undertaking this activity, you will be able to: • assess the moisture content in the given sample of flour, • determin

How many electron have br+, How many electron have br+ Neutral Br, bei...

How many electron have br+ Neutral Br, being in Group 7A, has 7 valence electrons; therefore, Br+ has 6.

Uses of benzene - hydrocarbon, Uses of Benzene - Hydrocarbon (1) In dry...

Uses of Benzene - Hydrocarbon (1) In dry cleaning (2) As a motor fuel when mixed with petrol. (3) As a solvent. (4) In the manufacture of gammexane (As insecticide).

Quality of ghee, which parameters are analysed to confirm the quality of gh...

which parameters are analysed to confirm the quality of ghee and what are the values of tested parameters to indicate the quality grade?

Explain primary processing of cereals, Normal 0 false false ...

Normal 0 false false false EN-US X-NONE X-NONE MicrosoftInternetExplorer4

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