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Ice crystallises in a hexagonal lattice ...

Ice crystallises in a hexagonal lattice having volume of the unit cell. As `132xx10^(-24)" cm"^(3)` . If the density is `0.9 g " cm"^(-3)` at a gases temperature the number of `H_(2)O` molecules per unit cell is

A

1

B

2

C

3

D

4

Text Solution

Verified by Experts

The correct Answer is:
D
Let no. of water molecules =n
`0.92=(ntimes18)/(6.02times10^(23)times132times10^(-24))`
`n=(0.92times6.02times132times10^(-1))/18`
=`(0.92times6.02times13.2)/18=4.06`
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