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

Set of quantum numbers is not possible for 4p electron, Which one of the f...

Which one of the following set of quantum numbers is not possible for 4p  electron : (1) n=4, l=1, m=-1, s= +1/2                 (2) n=4, l=1, m=0, s= +1/2          (3) n=

What happens to the energy values of d- orbitals, Q. What happens to the en...

Q. What happens to the energy values of d- orbitals? Let us see what happens to the energy values of d- orbitals under these stages. We start with the energy level diagram of a

Explain heat of combustion, Explain heat of Combustion? Ans) The amount ...

Explain heat of Combustion? Ans) The amount of heat liberated when single mole of any substance is completely burnt in oxygen is known as heat of combustion H is negative for he

Uses of oils and fats, Uses of oils and fats (a) Several oils and fats ...

Uses of oils and fats (a) Several oils and fats are used as food material. (b) Oils and fats are employed for the manufacture of glycerol, fatty acids, soaps, candles, veget

Geopolymer.., i need email tutor who has good background on geopolymer ceme...

i need email tutor who has good background on geopolymer cement to explain it for me such as the geopolymerisation process and fly ash composition by skype or Yahoo or hotmail i ne

Organic, Distinguish between acetaldehyde and ketone

Distinguish between acetaldehyde and ketone

The effect of temperature on the enzyme betaglucosid, What is the rate of r...

What is the rate of reaction at the optimum temperature? (the starting concentration of the protein was 2 mg/ml, the Extinction coefficient (e) of the chromogenic product is A515 =

ALIPHATIC CHEMISTRY, ACCOUNT FOR THE STABILITY OF CONJUGATED DIENES

ACCOUNT FOR THE STABILITY OF CONJUGATED DIENES

Equivalent conductance of sodium acetate, When a certain cell was filled wi...

When a certain cell was filled with 0.02N KCl solution, the resistance was 350ohm when the same cell was filled with 0.01N eq solution of sodium acetate the resistance was 1158ohm.

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