Home
Class 12
PHYSICS
The half-life of K^40 is 1.30xx10^9 y. A...

The half-life of `K^40` is `1.30xx10^9` y. A sample if `1.00g` of pure `KCI` gives 160 counts `s^(-1)`.Calculate the relative abundance of `K^40`(fraction of `K^40`present ) in natural potassium .

Text Solution

Verified by Experts

The correct Answer is:
`36`
Promotional Banner

Topper's Solved these Questions

  • NUCLEAR PHYSICS

    RESONANCE|Exercise Exercise-2 Part-3 One more than one options correct type|7 Videos

  • NUCLEAR PHYSICS

    RESONANCE|Exercise Exercise-2 Part-4 Comprehension|6 Videos

  • NUCLEAR PHYSICS

    RESONANCE|Exercise Exercise 2 Part-1 Only one option correct type|20 Videos

  • GRAVITATION

    RESONANCE|Exercise HIGH LEVEL PROBLEMS|16 Videos

  • REVISION DPP

    RESONANCE|Exercise All Questions|444 Videos

Similar Questions

Explore conceptually related problems

The half-life of 40 k is 1.30xx10^9 y. A sample if 1.00g of pure KCI gives 160 counts s^(-1) .Calculate the relative abundance of ^40K (fraction of ^40K present ) in natural potassium .

2 g of pure CsCl gives 200 counts s^(-1) . Calculate the relative abundance of Cs^(137) in natural caesium, if the half-life of Cs^(137) is 30 years.

The half-life of a radioactive substance is 40 days. A sample of it contains 1 mole nuclie. Calculate the number of disintegrations in the first second.

A first order reaction has a rate constant, k = 5.5 xx 10^(-14) s^(-1) , calculate the half life of reaction.

The rate constant of a reaction is 1.2 xx10^(-3) s^(-1) at 30^@C and 2.1xx10^(-3)s^(-1) at 40^@C . Calculate the energy of activation of the reaction.

The mass of an electron is 9.1 xx 10^(-31)J , if its K.E. is 3.0 xx 10^(-25)J . Calculate its wavelength.

._(19)^(49)K isotope of potassium has a half-life of 1.4 xx10^(9) yr and decays to form stable argon, ._(18)^(40)Ar . A sample of rock has been taken which contains both potassium and argon in the ratio 1:7 , i.e., ("Number of potassium -14 atoms")/("Number of argon -40 atoms")=(1)/(2) Assuming that when the rock was fromed no argon -40 was present in the sample and none has escaped subssequently, determine the age of the rock.

At 407 K, the rate contant of a chemical reaction is 9.5xx10^(-5) s^(-1) and at 420 K the rate constant is 1.9xx10^(-4)s^(-1) . Calculate the frequency equation is