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

Reformatsky reaction - aldehydes and ketones, Reformatsky reaction - Aldehy...

Reformatsky reaction - Aldehydes and Ketones Reformatsky reaction has the treatment of aldehyde and ketone along with a bromo acid ester in existence of metallic zinc to form -

Molar conductivity, What do you understand by molar conductivity at infinit...

What do you understand by molar conductivity at infinite dilution

Describe structure of solids, Q. Describe Structure of Solids? Ans. ...

Q. Describe Structure of Solids? Ans. Solids are different from gases and liquids because they have a fixed shape. This definite shape occurs as the individual particles w

Acidity, Why alcoholic acidity of maids is expressed as H2SO4?

Why alcoholic acidity of maids is expressed as H2SO4?

Equivalent mass by hydrogen displacemnt, 0.205g of a metal on treatment wit...

0.205g of a metal on treatment with dilute acid gave 106.6ml of hydrogen collected over water at 755mm pressure and 17 degree Celsius. calculate the equivalent mass of the metal. (

The maximum number of electrons, The maximum number of electrons in p -orbi...

The maximum number of electrons in p -orbital with n= s, m=1  is: (1) 6        (2) 2       (3) 14       (4) 10 Ans: 2

Illustrate saturated and unsaturated hydrocarbons, Q. Illustrate Saturated ...

Q. Illustrate Saturated and Unsaturated Hydrocarbons? Ans. The term hydrocarbon is similar to the term organic. The term hydrocarbon emphasizes the fact that these compou

Compound formular, Write the formula and name the example of k peroxide

Write the formula and name the example of k peroxide

Physical properties of alkyl halides, Physical properties of alkyl halides ...

Physical properties of alkyl halides (1) Physical state: Methoxy methane and methoxy ethane are gases whereas other members are volatile liquid along with pleasant smell.

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