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

Periodic table, what are the properties of d-block elements?

what are the properties of d-block elements?

Define gas constant, The gas constant, also known as the universal, usually...

The gas constant, also known as the universal, usually denoted by symbol R is a physical constant which is featured in a large number of fundamental equations in the physical scien

Periodic table, feature of s, p, d,f block in periodic table

feature of s, p, d,f block in periodic table

The following compounds is ionic, Which of the following compounds is ionic...

Which of the following compounds is ionic: (1)  Kl        (2) CH 4                                    (3) Diamond           (4) H 2 Ans:   Kl

Ventilation can be improved , i. Talk about the terms "short circuiting" an...

i. Talk about the terms "short circuiting" and "turbulence" in settling tanks under the following headings - causes, effects and design improvements/remedial calculates taken to av

Ions in aqueous solution, IONS IN AQUEOUS SOLUTION Ionic models : ...

IONS IN AQUEOUS SOLUTION Ionic models : Ions are charged chemical substance. Positively charged ions are called cations as they travel to the cathode of an electrolytic c

Determine infrared moisture balance in flour, Q. Determine Infrared moistur...

Q. Determine Infrared moisture balance in flour? Infrared moisture balance is an instrument for measuring the moisture content of materials that do not change their chemical

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