Home
Class 12
CHEMISTRY
Given that the abundances of isotopes .^...

Given that the abundances of isotopes `.^(54)Fe,.^(56)Fe` and `.^(57)Fe` are 5%,90% and 5% respectively, the atomic mass of Fe is:

A

55.85u

B

55.95u

C

55.75u

D

56.05u

Text Solution

Verified by Experts

The correct Answer is:
B

Atomic mass of `Fe=(5)/(100)xx54+(90)/(100)xx56+(5)/(100)xx57`
=55.95amu
Promotional Banner

Topper's Solved these Questions

  • BASIC PRINCIPLES

    OP TANDON|Exercise SET-2|7 Videos
  • BASIC PRINCIPLES

    OP TANDON|Exercise LEVEL B set1|52 Videos
  • BASIC PRINCIPLES

    OP TANDON|Exercise PRACTICE PROB.|58 Videos
  • ALDEHYDES AND KETONES

    OP TANDON|Exercise SINGLE INTEGER ANSWER TYPE QUESTIONS|10 Videos
  • BASIC PRINCIPLES OF ORGANIC COMPOUNDS (MECHANISM OF ORGANIC REACTIONS)

    OP TANDON|Exercise SINGLE INTEGER ANSWER TYPE QUESTIONS|4 Videos

Similar Questions

Explore conceptually related problems

Given that the abundacne of isotopes .^(54)Fe , .^(56)Fe , and .^(57)Fe is 5%, 90% and 5% respectively. The atomic mass of Fe is

Given that the abundances of isotopes ""^(54)Fe,""^(56)Fe , and ""^(57)Fe are 5%, 90%, and 50 % respectively. The atomic mass of iron is :

Given that the abundances of isotopes "_54Fe , "_56Fe and "_57Fe are 5% , 90% and 5% respectively the atomic mass of Fe is

Given that the standard reduction potentials E ^(0) of Fe^(+2)|Feis 0.26V and Fe ^(+3) |Fe is 0.76V respectively. The E ^(@)of Fe ^(+2)|Fe^(+3) is:

If E_(Fe^(3+)//Fe)^(@) and E_(Fe^(2+)//Fe)^(@) are -0.36 V and 0.439 V respectively, then value of E_(Fe^(3+)//Fe^(2+))^(@) is

OP TANDON-BASIC PRINCIPLES-OBJECTIVE QUE.
  1. Volume occupied by one molecule of water (density =1g//cm^(3)) is:

    Text Solution

    |

  2. 80g of oxygen contians as many atoms as in:

    Text Solution

    |

  3. A plant virus consists of uniform cylindrical particles of 150 overset...

    Text Solution

    |

  4. Common salt obtained from sea-water contains 95% NaCl by mass. The app...

    Text Solution

    |

  5. 10g hydrogen and 64 g oxygen were filled in a steel vessel and explode...

    Text Solution

    |

  6. An organic compound made of C , H and N contains 20% nitrogen. What wi...

    Text Solution

    |

  7. Given that the abundances of isotopes .^(54)Fe,.^(56)Fe and .^(57)Fe a...

    Text Solution

    |

  8. The number of atoms in 0.1 mol triatomic gas is: (N(A)=6.02xx10^(23)"m...

    Text Solution

    |

  9. Which of the following quantities has the least number of significant ...

    Text Solution

    |

  10. Prefix giga means:

    Text Solution

    |

  11. Calculate the massof oxygen obtained by complete decomposition of 10kg...

    Text Solution

    |

  12. In the DNA of E coli, the mole ratio of adenine to cytosine is 0.7. if...

    Text Solution

    |

  13. A gaseous hydrocarbon given upon combustion, 0.72g water and 3.08g of ...

    Text Solution

    |

  14. The ratio of masses of oxygen and nitrogen in a particular gaseous mix...

    Text Solution

    |

  15. 3.011xx10^(22) atoms of an element weighs 1:15gm. The atomic mass of t...

    Text Solution

    |

  16. A carbon compound contains 12.8% of carbon, 2.1% of hydrogen and 85.1%...

    Text Solution

    |

  17. At 300 K and 1 atm, 15mL of a gaseous hydrocarbon requires 375mL air c...

    Text Solution

    |

  18. The most abundant elements by mass in the body of a healthy human adul...

    Text Solution

    |

  19. If 3.01xx10^(20) molecules of H(2)SO(4) are removed from 98mg of H(2)S...

    Text Solution

    |

  20. 1g of Mg is burnt with 0.28g of O(2) in a closed vessel. Which reactan...

    Text Solution

    |