Home/ Questions/Q 461672
Next
In Process
Fakaruddin Singh Mitter
Asked: 2022-10-31T02:49:04+05:30 In:

A molecule `A_(2)B (Mw = 166.4)` occupies triclinic lattice with `a = 5 Å, b = 8 Å`, and `c = 4 Å`,. If the density of `AB_(2)` is `5.2 g cm^(-3)`, the number of molecules present in one unit cell is
A. `2`
B. `3`
C. `4`
D. `5`

A molecule `A_(2)B (Mw = 166.4)` occupies triclinic lattice with `a = 5 Å, b = 8 Å`, and `c = 4 Å`,. If the density of `AB_(2)` is `5.2 g cm^(-3)`, the number of molecules present in one unit cell is
A. `2`
B. `3`
C. `4`
D. `5`
Parabola
Leave an answer

Leave an answer

Browse

1 Answer

  1. Correct Answer – B
    Volume of unit cell ` = a xx b xx c = 5 xx 10^(-8) xx 8`
    ` xx 10^(8) xx 4 xx 10^(-8)`
    `= 1.6 xx 10^(-22) cm^(3)`
    Mass of unit cell `= 1.6 xx 10^(-22) cm^(3)`
    Mass of unit cell `= 1.6 xx 10^(-22) xx 5.2 = 8.32 xx 10^(-22)g`
    Number of molecules in one unit cell `= (8.32 xx 10^(-22)g)/(166.4 g mol^(-1))`
    `= 3`

    • 0
John Bhai Padmanabhan
Asked: 2022-10-29T00:51:03+05:30 In:

A molecule `A_(2)B (Mw = 166.4)` occupies triclinic lattice with `a = 5 Å, b = 8 Å`, and `c = 4 Å`,. If the density of `AB_(2)` is `5.2 g cm^(-3)`, the number of molecules present in one unit cell is

A molecule `A_(2)B (Mw = 166.4)` occupies triclinic lattice with `a = 5 Å, b = 8 Å`, and `c = 4 Å`,. If the density of `AB_(2)` is `5.2 g cm^(-3)`, the number of molecules present in one unit cell is
Parabola
Leave an answer

Leave an answer

Browse

1 Answer

  1. Correct Answer – 3
    Volume of unit cell `=axxbxxxc`
    `=5xx10^(-8)xx8xx10^(-8)xx4xx10^(-8)`
    `=1.6xx10^(-22)cm^(3)`
    Mass of unit cell `=1.6xx10^(-22)xx5.2`
    `=8.32xx10^(-22)g`
    No. of molecules in one unit cell
    `=(8.32xx10^(-22)xx6xx10^(23))/(166.4)=3`

    • 0