Home
Class 12
PHYSICS
In an experiment,the activity of 1.2 mil...

In an experiment,the activity of 1.2 milligram(mg) of radioactive potassium chloride (chlroide of isotopeK_40) was found to be `170s^(-1)`.Taking molar mass of `K-40Cl` to be 0.075 kg mole ^(-1),find the number of K-40 atoms in the sample and hence find the half-life of K-40 .Given ,Avogadro number =6.0 x 10^(23) mole^(-1).

Promotional Banner

Topper's Solved these Questions

  • Radioactivity

    MODERN PUBLICATION|Exercise EXERCISE|71 Videos

  • Polarisation of Light

    MODERN PUBLICATION|Exercise EXERCISE|50 Videos

  • REFLECTION OF LIGHT

    MODERN PUBLICATION|Exercise EXERCISE|57 Videos

Similar Questions

Explore conceptually related problems

Find the number of hydrogen atoms in 0.1 mole of H_2SO_3 .

If 10^(-4) dm^(3) of water is introduced into a 1.0 dm^(3) flask to 300K how many moles of water are in the vapour phase when equilibrium is established ? (Given vapour pressure of H_(2)O at 300K is 3170Pa R =8.314 JK^(-1) mol^(-1)) .

The wavelength of K_alpha X-rays produced by an X-ray tube is 0.76 overset@A .Find the atomic number of anode material of the X-ray tube .Take R=1.097 xx 10^7 m^(-1) .

200 cm^3 of an aqueous solution of a protein contains 1.26g of the protein . The osmotic pressure of such a solution at 300K is found to be 2.7 xx 10^-3 bar. Calculate the molar mass of the protein (R=0.083 L bar mol^-1 K^-1 )

If x, y in [0, 10] , then find the number of solutions (x,y) of the inequation 3(sec^2x-1)sqrt(9y^2-6y+2)<=1

A 0.50g sample of rock was found to have 2.5 xx 10^(-6) mol of ._(19)^(40)K (t_(1//2)=1.3 xx 10^(9) "yr") and 7.5 xx 10^(-6) mol of ._(20)^(40)Ca . How old is the rock?

MODERN PUBLICATION-Radioactivity-EXERCISE
  1. In an experiment,the activity of 1.2 milligram(mg) of radioactive pota...

    Text Solution

    |

  2. What is meant by radioactive substance?

    Text Solution

    |

  3. What is radioactivity ? State laws of radioactive decay and deduce an ...

    Text Solution

    |

  4. State the law of radioactive decay. Show that radioactive decay is exp...

    Text Solution

    |

  5. State the law of radioactive decay, If N0 is the number of radioactive...

    Text Solution

    |

  6. Show that decay rate R of a sample of a radio-nuclide is related to th...

    Text Solution

    |

  7. State the law of radioactive decay and hence derive the relation N=N0e...

    Text Solution

    |

  8. State the law of radioactive decay and hence derive the relation N=N0e...

    Text Solution

    |

  9. Sketch a graph to illustrate radioactive decay.

    Text Solution

    |

  10. What is meant by half life of a radioactive substance? Derive expressi...

    Text Solution

    |

  11. What is radioactivity ? State laws of radioactive decay and deduce an ...

    Text Solution

    |

  12. An isotope (92)U^(238) decays successively to form (90)Th^(234),(91)P...

    Text Solution

    |

  13. Define decay constant of a radioactive sample. Which of the following ...

    Text Solution

    |

  14. Define decay constant of a radioactive sample. Which of the following ...

    Text Solution

    |

  15. Define decay constant of a radioactive sample. Which of the following ...

    Text Solution

    |

  16. Define decay constant of a radioactive sample. Which of the following ...

    Text Solution

    |

  17. The rate constant and half life of a first order reaction are related...

    Text Solution

    |

  18. State the law of radioactive decay. Show that radioactive decay is exp...

    Text Solution

    |

  19. State the law of radioactive decay. Show that radioactive decay is exp...

    Text Solution

    |

  20. Define half life of a radioactive substance.

    Text Solution

    |

  21. What is radioactivity ? State laws of radioactive decay and deduce an ...

    Text Solution

    |