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

S block elements, lithium and beryllium markedly differ from other members ...

lithium and beryllium markedly differ from other members of their respstive groups

Differentiate between extrinsic and intrinsic semiconductor, Differentiate ...

Differentiate between extrinsic and intrinsic semiconductor. Obtain an expression for the carrier concentration for an intrinsic semi-conductor. Also demonstrate that Fermi level i

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.

Define the term "rice bran", Rice bran Rice bran contains primarily ins...

Rice bran Rice bran contains primarily insoluble fiber (cellulose) and soluble fiber (hemicellulose). Insoluble fiber adds bulk to the gastrointestinal (GI) track in humans cau

Aliphatic hydrocarbons, In the following reactions , identify each lettered...

In the following reactions , identify each lettered (A,B,C,D,E,F)product.

Upward and downward pressure are the same at any given depth, Upward and do...

Upward and downward pressure are the same at any given depth Get a glass cylinder at least 15 cm long and 4 cm in diameter. Such a length of tube can be made from a straight-si

Bromination o vanillin, Ask qwhy is 5-bromovanillin the major productuestio...

Ask qwhy is 5-bromovanillin the major productuestion #Minimum 100 words accepted#

LANTHANIDE & ACTINIDES, 1. why YbS and YbI2 are semiconducting solids but ...

1. why YbS and YbI2 are semiconducting solids but LaS and LaI2 show metallic character. 2. Why is aqueous solution of Eu2+ thermodynamically less susceptible to oxidation than any

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