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

Find out the ratio of the mass, 1. For what fraction of annual CO 2 emissi...

1. For what fraction of annual CO 2 emissions from fossil fuel burning are automobiles responsible? 2. A 1000-kg car travels 1.6 × 10 4 km/yr. What is the ratio of the mass of

Physical properties of ether - boiling points and solubility, Physical prop...

Physical properties of Ethers - Boiling points and Solubility (a) Boiling points: Boiling points of ethers are very much lower as compared to those of isomeric alcohols, althou

Equation for the Haber process, Ask question #M How do you calculate exact...

Ask question #M How do you calculate exactly how much ammonia you get from certain pressure changes using the equilibrium equation? Tried writing the equation like this: 2(1+x)^

Mole concept, What wieght of CO is required to form re2(CO)10 from 2.5 gm o...

What wieght of CO is required to form re2(CO)10 from 2.5 gm of re2(O)7

Reversible reaction, what is the advantag of reversible reaction?

what is the advantag of reversible reaction?

Lanthanide chemistry, Why lanthanides shows more than 7 coordination number...

Why lanthanides shows more than 7 coordination number

Solutions, how to determine the percentage of association or dissociation i...

how to determine the percentage of association or dissociation in a solution?

Explain about the galvanic cells, Explain about the Galvanic Cells? An ...

Explain about the Galvanic Cells? An electrochemical cell is a system in which passage of an electric current through an electrical circuit is linked to an internal cell reacti

#title.introduction to organic and inorganic chemistry, #question:although ...

#question:although CO is well known,why doesn''t SiO exist under normal conditions?

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