Question

Number of unit cells in 168.5g of CsCl crystal is______​

Answer 1

Answer:

Number of unit cells in 168.5g of CsCl crystal is

1.5×10

23

Answer 2

Answer:

6.023×10²³

Explanation:

Its because in cscl unit cell the cl- ions are present in the corner i.e 1/8×8=1 Thus having 1 cl- ion and Cs+ ion in the body centre i.e 1×1=1 Thus having 1 Cs+ ion. Thus we conclude that an unit cell of cscl contains 1cscl atom.

we know,

Molecular mass of Cscl is 168.5 gm

Given mass

No. of moles= -------------------------------

Molecular mass

=168.5/168.5

=1 mole

As only one Cscl unit is present in Cscl unit cell,we have 1 moles of Cscl present in 168.5 gm of Cscl crystal

1 mole=N°=6.023×10²³

Thus 6.023×10²³ no. of unit cells are present in 168.5 gram of Cscl crystal