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

What is internal energy, Every substance poses exact amount of energy known...

Every substance poses exact amount of energy known as internal energy or intrinsic energy (E).

Silica used in tlc and hplc column, What is difference among silica used in...

What is difference among silica used in TLC and HPLC column? Ans) TLC is known as thin layer chromatography. The simple methods works on the principle of adsorption, where as HP

Factors affecting development of a new product, Q. Factors affecting develo...

Q. Factors affecting development of a new product? The product development and marketing is not just selling a product, but is a highly multi-disciplinary domain comprising of

The number of neutron in tritium is, The number of neutron in tritium is : ...

The number of neutron in tritium is : (1) 1        (2) 2        (4) 3        (4) 0 Ans: 2

Preparation of hot souffle?, Q. Preparation of hot souffle ? i) Melt 1...

Q. Preparation of hot souffle ? i) Melt 12 g butter in a saucepan. Add 12 g flour and stir cook for 1-2 minutes. ii) Gradually add ¼ cup of scalded milk stirring continuou

Molecular formula of gaseous hydrocarbons or eudiometry, Molecular formula ...

Molecular formula of gaseous hydrocarbons   (Eudiometry) Eudiometry is a direct method for calculation of molecular formula of gaseous hydrocarbons without ascertaining the pe

Lithium and beryllium, lithium and beryllium markedly differ from other mem...

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

Show the characteristic baked flavour bread, Q. Show the characteristic bak...

Q. Show the characteristic baked flavour bread? Bread has its own characteristic baked flavour. This flavour diminishes with shelf life. A freshly baked bread would have intens

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