Home
Class 12
PHYSICS
Calculate the amount of ""(84)^(210)Po r...

Calculate the amount of `""_(84)^(210)Po` required to the particle of activity 5 millicurie. Given half-life of Po = 138 days, `N_(A)=6.023xx10^(23),1"curie"=3.7xx10^(10)` disintegrations.

Text Solution

Verified by Experts

`A=Nlamdaandlamda=(log_(e)2)/T_(1//2)`
or `N=A/(log_(e)2)T_(1//2)`
Number of moles, `n=N/N_(A)`
= `A/(log_(e)2)T_(1//2)/N_(A)`
= `(5xx10^(-3)xx3.7xx10^(10)xx138xx24xx3600)/(0.693xx6.023xx10^(23))`
= `5.28xx10^(-9)`
Mass of Po = `nM=5.28xx10^(-9)xx210g`
= `1.1xx10^(-6)g=1.1mug`.
Promotional Banner

Similar Questions

Explore conceptually related problems

Assertion : Atomicity of sulphur is 8 Reason : 1 mole of an element contains 6.023xx 10 ^(23) atoms .

Calculate the momentum of electrons if their wavelengths is 2Å . Given : h = 6.626 xx 10^(-34) Js and m = 9.1 xx 10^(-31) kg

A sample of air weighing 1.18 g occupies 1.0 xx 10^(3) cm^(3) when kept at 300 K and 1.0 xx 10^(5) pa. When 2.0 cal of heat is added to it constant volume, its temperature increases by 1^@C . Calculate the amount if heat needed to increases the temperature of air by 1^@C at constant pressure if the mechanical equivalent of heat si 4.2 xx 10^(-1) . Assume that air behaves as an ideal gas.

A radon specimen emits radiation of 3.7xx10^(3)GB q pe second. Convert this disintegration in terms of curie. (one curie =3.7xx10^(10) disintegration per second)

Calculate the product of the uncertainties of displacement and velocity of a moving electron having a mass of 9.1 xx 10^(-28) g . Given : h = 6.626 xx 10^(-34) kg m^2 s^(-1) m = 9.1 xx 10^(-28) g = 9.1 xx 10^(-31) kg