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

Hydrogen-spectrum, Energy difference is maximum between which of the consec...

Energy difference is maximum between which of the consecutive energy levels in an atom? Ans) According to the line spectrum of hydrogen maximum energy is there between FIRST AND

Differences in between the mixtures and compounds, Explain the mixtures and...

Explain the mixtures and compounds   Mixture Compound 1.      Mixtures are made from 2 or more substances which are not chemically co

Organic chemistry, difference b/w inductive and field effect

difference b/w inductive and field effect

Eqivalent weight of an element, what is n-factor and what is the formula fo...

what is n-factor and what is the formula for calculating it

List of common functional groups, Consult the inside front cover of the tex...

Consult the inside front cover of the text for a list of common functional groups. (a) nitrile (b) ether

Unity of hardnes, write the different units of hardness with their relatio...

write the different units of hardness with their relationship

Flame test, During a flame test why is calcium''s flame not persistent, whi...

During a flame test why is calcium''s flame not persistent, while that of strontium is? Ans) Because it does not have many ions as compared to the Strontium. It is the ions whic

Conventional current direction, Why the current flow is always oppositte in...

Why the current flow is always oppositte in direction to the conventional current direction? Ans) Availability of free electrons and application of potential difference are the c

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