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

The equation, The equation Δ x Δp ≥ h/ 4Π   shows: (1) de-Broglie relat...

The equation Δ x Δp ≥ h/ 4Π   shows: (1) de-Broglie relation         (2) Heisenberg's uncertainty principle   (3) Aufbau principle (4) Hund's rule ans:  Heisenberg'

Edta method of determining hardness of water, Q.   Discuss the EDTA method ...

Q.   Discuss the EDTA method of determining hardness of water.                                                 OR What is hardness of Water? How it is determined by EDTA

Irreversible reaction, why equilibrium state attainable from either way?

why equilibrium state attainable from either way?

How many degrees of freedom has a system, Q. How many degrees of freedom ha...

Q. How many degrees of freedom has a system consisting of solid NaCl in equilibrium with an aqueous phase containing H 2 O, NaC(aq), Cl (aq), HC(aq), and OH (aq)? Would it be possi

Cyanohydrin .., industrial application of cyanohydrin.?

industrial application of cyanohydrin.?

Explain about chemistry and matter, Q. Explain about Chemistry and Matter? ...

Q. Explain about Chemistry and Matter? Chemistry is the study of matter as well as the changes that it undergoes. Matter is anything which has mass and takes up space. Mas

#title., biography on Cecil E Boord

biography on Cecil E Boord

Why is the extraction of copper from pyrites is difficult?, Q)why is the ex...

Q)why is the extraction of copper from pyrites more difficult than that from its oxide ore through reduction? Ans) The Standard free energy of formation of Cu2S is greater than

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