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

Define matrix of the mitochondrion., Write down the complete names and the ...

Write down the complete names and the commonly used abbreviations of the molecules A and B. a) Illustrate the line bond structures of the reactive moieties of these molecules i

Types of rocket propellants - chemistry in action, Types of rocket propella...

Types of rocket propellants: Depending on the physical state, propellants can be categorized as: a. Hybrid propellants b. Liquid propellants c. Solid propellants

Polymers, giving correct formulas give the reactantsand products in the for...

giving correct formulas give the reactantsand products in the formation of poly2 butane

Carbon valency, how carbon tetra-valency lead to stability?

how carbon tetra-valency lead to stability?

What are fat soluble vitamins, Question 1 Write a short note on the follow...

Question 1 Write a short note on the following Hydrophobic interaction Sphingolipids Steroid hormones Enzyme specificity Question 2 Define and classify amin

Polarography, Describe the following electrochemical methods in terms of th...

Describe the following electrochemical methods in terms of their working principles instrumentation and applications i. Potentiometry ii. polarography iii. Conductometry

P-nitrobenzenediazonium ion, P-nitrobenzenediazonium ion The p-nitroben...

P-nitrobenzenediazonium ion The p-nitrobenzenediazonium ion, which is formed in the diazotization reaction, acts as the electrophile in an electrophilic aromatic substitution a

Molarity and normality, When 100 ml of M/10 H2SO4 is mixed with 500 ml of M...

When 100 ml of M/10 H2SO4 is mixed with 500 ml of My/10 NaOH then nature of resulting solution and normality of excess reactant left is

Metal absoption, Metal absorption by reusable material ?

Metal absorption by reusable material ?

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