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

To prepare crystals of pure phthalic acid from impure sample, what will be ...

what will be theory of phthalic acid of crystallization?

What numerical prefixes indicate in ligands, Q. What Numerical prefixes ind...

Q. What Numerical prefixes indicate in ligands? In any complex species, the ligands are quoted in alphabetical order, without regard to charge, before the name of the central m

Photochemistry, what is importance of photochemical quantum yield

what is importance of photochemical quantum yield

Uses of pyrogallol, Uses of pyrogallol (a) As a developer in photograph...

Uses of pyrogallol (a) As a developer in photography. (b) As a hair dye. (c) In medicine of skin diseases like eczema. (d) For absorbing none reacted oxygen in gas ana

Dipole moment, why dipole moment of CH3CL is more than CH3F

why dipole moment of CH3CL is more than CH3F

.ethanol, general methods of preparation of ethanol

general methods of preparation of ethanol

Transfer of electrons from lower to higher energy levels, The electrons  wo...

The electrons  would go to lower energy levels first and then to higher energy levels according to which of the following: (1) Aufbau principle (2) Pauli's exclusion princip

Preparative TLC, How to prepare preparative TLC plates and how to separate ...

How to prepare preparative TLC plates and how to separate compound by preparative TLC

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