Home
Class 12
CHEMISTRY
A sample of U^(238) ("half life" = 4.5 x...

A sample of `U^(238) ("half life" = 4.5 xx 10^(9)yr)` ore is found to contain `23.8 g" of " U^(238) ` and `20.6g ` of `Pb^(206)`. Calculate the age of the ore

Text Solution

Verified by Experts

The correct Answer is:
`4.5 xx 10^(9)` years
Promotional Banner

Topper's Solved these Questions

  • ATOMIC STRUCTURE

    FIITJEE|Exercise SINGLE INTERGER ANSWER TYPE QUESTIONS|29 Videos

  • ATOMIC STRUCTURE

    FIITJEE|Exercise NUMERICAL BASED QUESTIONS INDICATED BY DIGITAL INTEGER BY XXXXX.XX|2 Videos

  • ATOMIC STRUCTURE

    FIITJEE|Exercise MATCHING LIST TYPE QUESTIONS|5 Videos

  • ALKYL AND ARYL HALIDES

    FIITJEE|Exercise NUMERICAL BASED QUESTIONS|1 Videos

  • CARBOHYDRATES, AMINO ACIDS, POLYMERS AND PRACTICAL ORGANIC CHEMISTRY

    FIITJEE|Exercise EXERCISE|4 Videos

Similar Questions

Explore conceptually related problems

A sample of U^(238) (half-line = 4.5xx10^(9) yr ) ore is found to contain 23.8g of U^(238) and 20.6g of Pb^(206) Calculate the age of the ore.

Uranium ( ""_(92)U""^(238) ) decayed to ""_(82)Pb""^(206) . The process is ""_(92)U""^(238)underset(xalpha,ybeta)to.""_(82)Pb""^(206) t""_(1//2)of U""^(238)=4.5xx10""^(9) years A sample of rock from South America contains equal number of atoms of U""^(238) and Pb""^(""^(206) . The age of the rock will be

Uranium ._(92)U^(238) decayed to ._(82)Pb^(206) . They decay process is ._(92)U^(238) underset((x alpha, y beta))(rarr ._(82)Pb^(206)) t_(1//2) of U^(238) = 4.5 xx 10^(9) years The analysis of a rock shows the relative number of U^(238) and Pb^(206) atoms (Pb//U = 0.25) The age of rock will be

^238U decays to ^206(Pb) with a half-life of 4.47xx10^9 y.This happens in a number of steps .Can you justify a single half-life for this chain of processes? A sample of rock is found to contain 2.00mg of 238U and 0.600 mg of 206(Pb) .assuming that all the lead has come form uranium ,find the life of the rock.

(a) On analysis a sample of uranium ore was found to contian 0.277g of ._(82)Pb^(206) and 1.667g of ._(92)Pb^(206) and 1.667g of ._(92)U^(238) . The half life period of U^(238) is 4.51xx10^(9) year. IF all the lead were assumed to have come from decay of ._(92)U^(238) , What is the age of earth? (b) An ore of ._(92)U^(238) is found to contain ._(92)U^(238) and ._(82)Pb^(206) in the weight ratio of 1: 0.1 The half-life period of ._(92)U^(238) is 4.5xx10^(9) year. Caluculate the age of ore.

FIITJEE-ATOMIC STRUCTURE-NUMERICAL BASED QUESTIONS
  1. 20% N(2)O(4) molecules are dissociated in a sample of gas at 27^(@)C a...

    Text Solution

    |

  2. A mixture of AB(3)(g) and A(2)B(4)(g) is placed in a sealed container....

    Text Solution

    |

  3. The wavelength of photoelectric threshold energy of a metal is 230 nm ...

    Text Solution

    |

  4. When 1-pentyne ( A) is treated with 4N alcoholic KOH at 175^(@)C , it ...

    Text Solution

    |

  5. About 3 dm^(3) gastric juice are produced per day in a human body from...

    Text Solution

    |

  6. [Ag(CN)(2)]^(-) rarr 2Ag^(+) + 2CN^(-) , the K(c ) for the reaction at...

    Text Solution

    |

  7. What volume of 0.1M sodium formate solution should be added to 50 mL o...

    Text Solution

    |

  8. 100ml of 0.75 N NH(4)OH is mixed with 100ml of 0.25 N HCl. The K(b) of...

    Text Solution

    |

  9. Calculate the percentage of free volume available in 1 mol of gaseous ...

    Text Solution

    |

  10. A sample of U^(238) ("half life" = 4.5 xx 10^(9)yr) ore is found to co...

    Text Solution

    |

  11. How much will the K.E. of an electron in H -atom change if the atom em...

    Text Solution

    |

  12. A mixture of ethene and ethane occupied 35.5 L at 1.0 bar and 45K. The...

    Text Solution

    |

  13. Determine the number of mole of AgI which may be dissolved in 1.0 litr...

    Text Solution

    |

  14. The equivalent conductances of sodium chloride, hydrochloric acid and ...

    Text Solution

    |

  15. Determine the hydrogen ion concentration in 1.0 M solution of HCN , i...

    Text Solution

    |

  16. Calculate pH of basic solution having OH^(-) as (i) 10^(-2) M and ( ii...

    Text Solution

    |

  17. Calculate Q,W,Delta E and DeltaH for the isothermal reversible expansi...

    Text Solution

    |

  18. An insulated vessel contains 1mole of a liquid, molar volume 100mL at ...

    Text Solution

    |