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

Phosphate conditioning, Q.   Write phosphate conditioning method for water ...

Q.   Write phosphate conditioning method for water softening with suitable chemical reactions. How it is different from soda lime method. Ans.  Phosphate condition

Thermodynamics, What are the limitations of second law of thermodynamics?

What are the limitations of second law of thermodynamics?

Freezing and Boiling points, Calculate the molarmass of a nonelectrolyte th...

Calculate the molarmass of a nonelectrolyte that lowers the freezing point of 25.00g of water to -3.9 degrees C when 4.27 g of the substance is dissolved in the water.

Nitro compound ., what the uses of nitro compound in pharmacy

what the uses of nitro compound in pharmacy

Functions of triglycerides - biomolecules, functions of triglycerides T...

functions of triglycerides The functions of triglycerides are as given (a) Triglycerides are energy reserves in the cells and tissues of living procedure. While digested, tr

Explain ethanolysis, Explain Ethanolysis Ethanolysis of the acetal link...

Explain Ethanolysis Ethanolysis of the acetal linkage occurs in ethanol just as hydrolysis occurs in water.  An ethyl pyranoside is also produced from the glucose residue at th

Double indicator, what is the role of a double indicator

what is the role of a double indicator

Describe what you understand by elasticity, Question: (a) Explain why m...

Question: (a) Explain why metals are mostly ductile and ceramics brittle at room temperature. (b) Describe what you understand by the following terms. Use appropriate il

Determine how many pounds of feed are required, A water solution contains 6...

A water solution contains 64% Na 2 S 2 O 2 together with 1.0% soluble impurity. Upon cooling to 5°C, Na 2 S 2 O 2 ·5H 2 O. crystallizes out. The solubility of this hydrate is 1.35

General characteristics of the f-block, Q. General Characteristics of the f...

Q. General Characteristics of the f-block? You know that the 14 elements from cerium (Z = 58) to lutetium (Z = 71), which follow lanthanum (Z = 57) in the periodic table, are k

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