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

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

Rancidification - chemical properties of oils and fats, Rancidification - c...

Rancidification - chemical properties of oils and fats On long storage in contact along with air and moisture, oils and fats develop unlikable smell. The process is termed as r

If an electron has spin quantum number, If an electron has spin quantum num...

If an electron has spin quantum number of +1/2  and a magnetic quantum number of -1  , it cannot be presented in an: (1) d -orbital (2) f -orbital (3) p -orbital (4)s-

Hydrogen., what are the chemical properties of protium, deuterium and triti...

what are the chemical properties of protium, deuterium and tritium.

Thermodynamics / Quantum Mechanics, 1. A laboratory animal exercised on a t...

1. A laboratory animal exercised on a treadmill that was connected to a weight with a mass of 250. g through a pulley. The work done by the animal raised the weight through 1.32 m.

LATTICE OR CRYSTAL LATTICE, What are laws of crystallography?How it helps u...

What are laws of crystallography?How it helps us in the study of crystal structure

Define product process problem in experimental design method, Define Produc...

Define Product process problem in experimental design method In food product design, there are two different kinds of system problems - process and mixture problems - that shou

Classification of polymers, Classification of polymers Classification l...

Classification of polymers Classification lies on source of availability: They are categorized as (a) Natural polymers   (b) Synthetic polymers

Degree of hardness, DEGREE OF HARDNESS:   The degree of hardness o...

DEGREE OF HARDNESS:   The degree of hardness of water is conveniently expressed in terms of equivalent amount of CaCO 3 . Although hardness of water is never present in th

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