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

Convex lens, what is the graph between magnification and image distance for...

what is the graph between magnification and image distance for a convex lens..and how can we find the focal length for the lens using the graph?   Ans) The distance between the len

Organic, Few methods preparation of cyacloalken

Few methods preparation of cyacloalken

??, what is an ionic compound

what is an ionic compound

Calculate the ideal rm ratio for cation-anion, Calculate the ideal rM/rX ra...

Calculate the ideal rM/rX ratio for cation-anion and anion-anion contacts of an octahedral arrangement of anions around a cation as show in one plane in the figure below.

What are liquid crystals, What are liquid crystals? Give examples. Liq...

What are liquid crystals? Give examples. Liquid crystals are an intermediate state among liquid state and solid state. They exhibit some characteristic properties of both soli

Transition elements of the f-block, Q. Transition elements of the f-block? ...

Q. Transition elements of the f-block? The salient features of the chemistry of the transition elements of the f-block. Due to filling of electrons in the f-orbitals of an inne

Bohr''s model of the hydrogen atom, Which of the following statements does ...

Which of the following statements does not form part of Bohr's model of the hydrogen atom: (1) Energy of the electrons in the orbit is quantized (2) The electron in the orbi

COSY, How can in understand cosy

How can in understand cosy

13mg of Mg in 4.2mL of HCl, How long would it take to consume 13mg of Mg in...

How long would it take to consume 13mg of Mg in 4.2mL of 1.25M HCl?

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