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 total number of electrons that can be accommodated, The total number of...

The total number of electrons that can be accommodated in all the orbitals having principal quantum number 2 and azimuthal quantum number 1 is: (1) 2        (2) 4

Ions, what are ions

what are ions

The oxidation of benzyl alcohol to benzaldehyde, In which region can these ...

In which region can these properties of the fluid be tuned more simply - near the critical point or at higher pressure/temperature (consider the critical constants and the results

An isostere is, An isostere is: (1) NO -2 and O 3 (2) No -2 and...

An isostere is: (1) NO -2 and O 3 (2) No -2 and PO 3- 4      (3)  CO 2, N 2 O, NO - 3                               (4)Clo - 4 and OCN - Ans: NO -2

Glass electrode, why glass electrode is called indicator electrode

why glass electrode is called indicator electrode

Chemical thermodynamic properties, The following cell is used for measuring...

The following cell is used for measuring the partial pressure of oxygen at 700 o C. (Pt) Cu 2 Cu 2 0 / 0.85 ZrO 2 - 0.l5 CaO / O 2 (Pt) Knowing that conduction through the

When alpha particles are sent through a thin metal foil, When α -particles ...

When α -particles are sent through a thin metal foil, most of them go straight through the foil because (one or more are correct) : (1) Alpha particles are much heavier than ele

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