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 metal ion will have highest number of unpaired electron, Which of the m...

Which of the metal ion will have highest number of unpaired electrons: (1) Cu +                  (2)  Fe +       (3) Fe 3+                             (4) Co 2+ A

UV-Vis Spectroscopy of organic compound, Why does lycopene absorb at loner ...

Why does lycopene absorb at loner wavelength than beta carotene though both have same number of double bonds?

Explain about stereoisomerism, Q. Explain about Stereoisomerism? Stereo...

Q. Explain about Stereoisomerism? Stereoisomers have the same bonds but the arrangement of atoms in space is different.  Stereoisomerism can be divided into two kinds: geometri

Organic chemistry, Alkyl halide on reaction with dry silver oxide

Alkyl halide on reaction with dry silver oxide

The abstraction of a hydrogen atom, The abstraction of a hydrogen atom ...

The abstraction of a hydrogen atom The H-CN bond is stronger than the O-H bond, the abstraction of a hydrogen atom from HCN by the tert-butoxy radical is endothermic by 528 - 4

What are the various factors which affect stability?, The stability of a co...

The stability of a complex relies on 1. Nature of central ion:  the word nature means the charge density on the central ion i.e. greater is the charge density or larger the c

Determine element that mass number of anion is given, The mass number of an...

The mass number of an anion,   X 3- is 14. If there are ten electrons in the anion, the number of neutrons in the nucleus of atom, X 2   of the element will be: (1) 10

Electrochemistry, The standard EMF of Pt/H2(g)/HCl(aq)//AgCl(aq)/Ag has bee...

The standard EMF of Pt/H2(g)/HCl(aq)//AgCl(aq)/Ag has been experimentally determined from 0-90?C to yield the following; E?/V =0.23659 – 4.856 * 10-4t(?C) – 3.4205 * 10-4t2(?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