Home
Class 12
PHYSICS
Find the number of electrons present in ...

Find the number of electrons present in an 8-g gold pin . Given : Molar mass of gold =197 g/mol , electron per atom is gold =79 and Avogadro's number `=6.023xx10^23 g^(-1) mol^(-1)`

Text Solution

Verified by Experts

`193.55xx10^22` electrons
Promotional Banner

Topper's Solved these Questions

  • ELECTRIC CHARGES AND FIELDS

    MODERN PUBLICATION|Exercise Conceptual Questions|51 Videos

  • ELECTRIC CHARGES AND FIELDS

    MODERN PUBLICATION|Exercise Tough & Tricky Problems|20 Videos

  • ELECTRIC CHARGES AND FIELDS

    MODERN PUBLICATION|Exercise Chapter Practice Test|15 Videos

  • DUAL NATURE OF RADIATION AND MATTER

    MODERN PUBLICATION|Exercise CHAPTER PRACTICE TEST|15 Videos

  • ELECTROMAGNETIC INDUCTION

    MODERN PUBLICATION|Exercise CHAPTER PRACTICE TEST FOR BOARD EXAMINATION|14 Videos

Similar Questions

Explore conceptually related problems

Caculate the number of atoms in 39.4 g gold. Molar mass of gold is 197g mole^(-1).

Calculate the number of atom in 39.4 g gold. Molar mass of gold is 197 g "mole"^(-1)

Number of moles of gold present in a piece of gold has a mass 12.6 g is (AU = 197)

How many moles of electrons weigh one kilogram? (Mass of electron =9.108xx10^(-31) kg, Avogadro's number =6.023xx10^(23) )

How many moles and atoms of gold are present in 49-25 g of gold? (Atomic mass of gold=97u)

MODERN PUBLICATION-ELECTRIC CHARGES AND FIELDS -Practice Problems
  1. A piece of woll is rubbed against a PVC strip. What will be the charg...

    Text Solution

    |

  2. Find the number of electrons present in an 8-g gold pin . Given : Mola...

    Text Solution

    |

  3. Find the total negative or positive charge on a 2 g silver coin. The a...

    Text Solution

    |

  4. Find the total negative and positive charges in 500 cc of water Given:...

    Text Solution

    |

  5. An object with a net positive charge of 2 xx 10^(-12) C contains 1.5 x...

    Text Solution

    |

  6. A Spherical ball is given one million electrons per second Calculate t...

    Text Solution

    |

  7. An object with an initial charge of 4 C is given 9 xx 10^19additional ...

    Text Solution

    |

  8. A charged object having charge of-4C is given 9xx 10^19 electrons. Cal...

    Text Solution

    |

  9. Two spherical balls of the same radius carry charges -0.4 C and-0.9 C....

    Text Solution

    |

  10. Calculate the change in mass of an object if 800 electrons are given t...

    Text Solution

    |

  11. The charges on three dentical ebonite spheres are +2 mC, -4 mC and +...

    Text Solution

    |

  12. The identical anions are placed 7xx10^(-10) m apart and experience of ...

    Text Solution

    |

  13. Two electrons are placed at a distance d such that electrostatic force...

    Text Solution

    |

  14. Two identical small plastic balls are rubbed against a piece of wool ...

    Text Solution

    |

  15. calculate the change in electrostatic force between the two balls, if ...

    Text Solution

    |

  16. Two identical metallic balls with equal charges are kept 4.5 cm apart....

    Text Solution

    |

  17. Two small objects are rubbed against each other using insulating handl...

    Text Solution

    |

  18. A point charge Q is kept fixed on a table and another particle of char...

    Text Solution

    |

  19. Total charge Q is divided between two point objects in such a manner t...

    Text Solution

    |

  20. Two point charges with charge magnitudes 2 nC and 3 nC are placed at a...

    Text Solution

    |