Home
Class 12
CHEMISTRY
Potassium crystallizes in a body centred...

Potassium crystallizes in a body centred cubic lattice. How many unit cells are present in 2g potassium ? (At. Mass of K=39)

Text Solution

Verified by Experts

A bcc unit cell has 2 lattice points per unit cell
`therefore` Moles of potassium =`2/39`
Number of atoms of K=`(2xx6.022xx10^23)/39`
Number of unit cells=`(2xx6.022xx10^23)/(39xx2)=1.54xx10^22`
Promotional Banner

Topper's Solved these Questions

  • THE SOLID STATE

    AAKASH INSTITUTE|Exercise Try Yourself|56 Videos

  • THE SOLID STATE

    AAKASH INSTITUTE|Exercise ASSIGNMENT SECTION-A (OBJECTIVE)|50 Videos

  • THE S-BLOCK ELEMENTS

    AAKASH INSTITUTE|Exercise Assignment (Section-J)|10 Videos

  • THERMODYNAMICS

    AAKASH INSTITUTE|Exercise ASSIGNMENT (Section -D) Assertion-Reason Type Questions|15 Videos

Similar Questions

Explore conceptually related problems

Potassium crystallises in a body centred cubic unit cell. The mass of one unit cell is

Lithium crystallizes in a body centred cubic lattice. How many next-nearest neighbours does each Li have?

Potassium crystallizes in a body centered cubic lattice. What is the approximate number of unit cells in 4.0g of potassium? Atomic mass of potassium = 39.

Potassium crystallizes in a body centred cubic lattice . What is the approximate number of unit cells in 4.0 gm of potassium ? (Atomic mass of potassium =39)

Potassium crystallizes in body centered cubic lattice with a unit cell length a = 5.2 Å (A) what is the distance betweenn nearest neighbourss? (B) What is the distance between next nearest neighbour ? (C) How many nearest neighbours does each K atom have ? (D) How many next nearest neighbours does each K has ? (E) What is calculated density of crystalline K

The vacant space in body - centred cubic lattice b.c.c. unit cell is about ,

Tungsten crystallizes in body centred cubic lattice. Calculate the number of unit cells in 1.5 g of tungsten crystallizes in body centred cubic lattice . Calculate the number of unit cells in 1.5 g of tungsten (Atomic mass of tungsten = 184 u).

(a) Give two differences between ferromagnetic and anti-ferromagnetic substances. (b) Tungsten crystallizes in body centred cubic lattice. Calculate the number of unit cells in 1.5 g of tungsten. (At mass of tungsten = 184 u)

AAKASH INSTITUTE-THE SOLID STATE -Assignment (SECTION - D) (ASSERTION-REASON TYPE QUESTION)
  1. Potassium crystallizes in a body centred cubic lattice. How many unit ...

    Text Solution

    |

  2. A : In NaCl structure, the interionic distance is a/2 (a = Unit cell e...

    Text Solution

    |

  3. A : The co - ordination number of CaF(2) is 8 : 4. R : Ca^(2+) ion...

    Text Solution

    |

  4. A : The number of spheres are equal to the number of octahedral voids ...

    Text Solution

    |

  5. A : In Schottky defect, density of crystal decreases. R : Equal nu...

    Text Solution

    |

  6. A : If a tetrad axis is passed through the unit cell of NaCl and all i...

    Text Solution

    |

  7. A : A particle at the corner of CCP unit cell has (1)/(8)th of its con...

    Text Solution

    |

  8. A : Glass belongs to the category of covalent network solid. R : U...

    Text Solution

    |

  9. A : NaCl shows Schottky defect at room temperature. R : NaCl shows...

    Text Solution

    |

  10. A : Fe(3)O(4) is ferrimagnetic at room temperature but becomes paramag...

    Text Solution

    |

  11. A : In molecular solids the lattice points are occupied by the atoms o...

    Text Solution

    |

  12. A : Silicon is insulator at 0 K but semiconductor at room temperature....

    Text Solution

    |

  13. A : Amorphous solids are isotropic. R : Amorphous solids are not rig...

    Text Solution

    |

  14. A : In NaCl coordination number of Cl^(-) ion is 6 but in CsCl coordin...

    Text Solution

    |

  15. A : All crystals of same substance possess the same elements of symmet...

    Text Solution

    |

  16. A : AgBr shows both Schottky and Frenkel defect. R : AgBr is a cry...

    Text Solution

    |

  17. A : Number of carbon atoms per unit cell in diamond is 8. R : The ...

    Text Solution

    |

  18. A : The coordination number of ionic compound depends upon radius rati...

    Text Solution

    |

  19. A : Number of rectangular plane in a cubic crystal is 3. R : Recta...

    Text Solution

    |

  20. A : ccp is more efficient than hcp. R : Packing fraction is differe...

    Text Solution

    |

  21. A : Coordination number of both Na^(+) and Cl^(-) NaCl is 6. R : Se...

    Text Solution

    |