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

Thermodynamics, Calculate the free energy change of following reaction at29...

Calculate the free energy change of following reaction at298 kelvin H2+I2=2HI if the enthalpy change is 51.8816kj and the entropy change is 166.15j is this reaction thermodyanamica

What was the color and approximate ph, What was the color and approximate p...

What was the color and approximate pH of the cabbage juice indicator solution before any electrolysis was attempted? What was the resulting color and approximate pH of the solution

Physical properties of alkyl isocyanides, Physical properties of Alkyl isoc...

Physical properties of Alkyl isocyanides (1) Alkyl isocyanides are colourless, unpleasant smelling liquids. (2) Alkyl isocyanides are insoluble in water but freely soluble i

What are native minerals, Q. What are Native Minerals? These minerals c...

Q. What are Native Minerals? These minerals contain the metal in free or elemental state, e.g., copper, silver, gold, platinum and iron. The metals are usually found mixed with

Mixture analysis, why HNO3 is not used for detection of acidic radicals of ...

why HNO3 is not used for detection of acidic radicals of 1st and 2nd group?

Hyperconjugative effect - organic chemistry, Hyperconjugative effect Wh...

Hyperconjugative effect While a H-C bond is attached to an unsaturated system like double bond or a benzene ring, the sigma (σ) electrons of the H-C bond interact or enter into

Correct set of four quantum numbers for valence electron, Correct set of fo...

Correct set of four quantum numbers for valence electron of rubidium (Z = 37) is: (1)  5,0,0,+1/2                    (2)  5, 1,0,+1/2    (3)  5,1,1,+1/2

P block, Imp reactions of p block

Imp reactions of p block

Crystal system, how many forms are there in crystal system

how many forms are there in crystal system

Illustrate Chemical nomenclature, Q. Illustrate Chemical nomenclature? ...

Q. Illustrate Chemical nomenclature? Ans. Chemical nomenclature is the system of names that chemists use to identify compounds precisely. The systematic method of naming c

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