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

Conductivity, List three factor that affect conductivity

List three factor that affect conductivity

Percent composition, the dug known as LSD has the formula C20H25N3O.one sus...

the dug known as LSD has the formula C20H25N3O.one suspected sample contained 74.7%C,7.95%H,9.99%N.calculate the theoretical percentages to four significant figures

The radius of first bohr''s orbit for hydrogen, The radius of first Bohr's ...

The radius of first Bohr's orbit for hydrogen is 0.53 Å. The radius of third Bohr's orbit would be: (1) 0.79 Å              (2) 1.59 Å      (3) 3.18 Å      (4)4.77 Å

Metion the food product of grapes, Grapes The components of grapes and g...

Grapes The components of grapes and grape products believed to play a significant role in preventing or delaying the onset of diseases including cancer and cardiovascular diseas

Distillation, Ask question #Minimum 100oo words

Ask question #Minimum 100oo words

Why p-nitro toluene is higher boiling point , Why p-nitro toluene is higher...

Why p-nitro toluene is higher boiling point than o-nito toluene ?   Ans) The term hydrogen bonding is used to define dipole-dipole attractive forces of this type. The proton invol

Corrosion, classification corrosion

classification corrosion

Illustrate about werners theory, Q. Illustrate about Werners Theory? Ba...

Q. Illustrate about Werners Theory? Based on the study of a large number of compounds. Wermer gave the following postulates: • Metal atoms in complexes possess two types o

Ch 2 atomic structure of class 11, If the velocity of hydrogen molecule is5...

If the velocity of hydrogen molecule is5*10^4 cm/sec tjen its de broglie wavelength is

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