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 shape of 2p orbital is, The shape of 2p  orbital is ; (1) Spherical...

The shape of 2p  orbital is ; (1) Spherical (2) Ellipsoidal (3) Dumb-bell (4)Pyramidal ans:  Dumb-bell

Ph scale, Being simultaneously basic and acidic, water undergoes autoprotol...

Being simultaneously basic and acidic, water undergoes autoprotolysis, also called self-ionization: The equilibrium constant is   H3O+ in these equations is gene

IONIC EQUILIBRIUM, OSTWALDS DILUTION LAW IS APPLICABLE TO WHAT

OSTWALDS DILUTION LAW IS APPLICABLE TO WHAT

Mesomeric effect, what are the differences between positive and negative me...

what are the differences between positive and negative mesomeric effect

STUDYING, HOW TO PREPARE IN EXAMS IN EASY MANNER?

HOW TO PREPARE IN EXAMS IN EASY MANNER?

Knocking - characteristics of hydrocarbons, Knocking - Characteristics of h...

Knocking - Characteristics of hydrocarbons The metallic sound throughout working of an internal combustion engine is known as knocking.  "As much the compression greater wil

Solid state, How does crystallography help in study of crystal structure

How does crystallography help in study of crystal structure

#title. chemical bonding., sometimes we put a coordinate bond or sometimes ...

sometimes we put a coordinate bond or sometimes we put a double bond in between s and a nonprotonated o atom in the structure of h2so4.is there any diifference in between these two

Name the location where protein synthesis occurs, a) Write the following ab...

a) Write the following about protein synthesis: (i) Name the location where protein synthesis occurs. (ii) How do 64 codons code for only 20 amino acids? (iii) Which of t

The number of radial nodes 3s and 2p orbitals respectively, The number of r...

The number of radial nodes of 3s and 2p orbitals are respectively : (1) 2, 0   (2) 0, 2          (3) 1, 2             (4) 2, 1 Ans: 2, 0

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