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

What is sensory evaluation, Q. What is sensory evaluation? Foods have s...

Q. What is sensory evaluation? Foods have several characteristics that require evaluation by sensory methods. The various food attributes that are judged on the sensory scale a

Discuss coordination number., Coordination no. is the no. assigned to an at...

Coordination no. is the no. assigned to an atom which tells us that how many other atoms are directly attached to it. eg. Pcl5 the cordination no. will be 5

Explain transition elements and their compounds, Explain the following obse...

Explain the following observations: (i)  Generally there is an increase in density of elements from titanium (Z = 22) to copper (z =29) in the first series of transition element

Tyndall effect, what is tyndall effecet? can you give an example

what is tyndall effecet? can you give an example

Refining of petroleum, Refining of petroleum: Petroleum (crude) extract...

Refining of petroleum: Petroleum (crude) extracted from earth's crust is an intimate mixture of many organic compounds. Crude petroleum needs to be purified and its components

Illustrate properties of protons and neutrons, Q. Illustrate Properties of ...

Q. Illustrate Properties of Protons and Neutrons? Ans. We now know that following fundamental properties of protons and neutrons: 1. The proton has a charge of +1, which

Explain oat products, Oat products Oats fulfill admirably the descript...

Oat products Oats fulfill admirably the description of a  functional food, as one that, in addition to providing all normal attributes of a food - basic sustenance, pleasing t

Error check, verify that less than 5% of the reactants have been consumed

verify that less than 5% of the reactants have been consumed

Describe a method that used to separate the components, Describe a method t...

Describe a method that could be used to separate the components of the following a) Sand and iron filings b) Sawdust and lead pellets c) Salt and glass particles d) Silt (water and

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