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Byju's Answer
Standard XII
Chemistry
Metal Excess Defect
There are 7 m...
Question
There are 7 molecules of water of crystallization in the crystal of____________ .
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Q.
Water of crystallization is the fixed number of water molecules chemically attached to a unit of a salt in its crystalline form.
Q.
A substance containing water of crystallization is known as a/an:
Q.
Lithium boron hydride crystallizes in an orthorhombic system with 4 molecules per unit cell. Dimensions of the unit cell are:
a
=
6
∘
A
,
b
=
4
∘
A
and
c
=
7
∘
A
.
If the molar mass is
21
g
, calculate the density of crystal.
Q.
Lithium borohydride
(
L
i
B
H
4
)
, crystallizes in an orthorhombic system with
4
molecules per unit cell. The unit cell dimensions are
a
=
6.22
∘
A
,
b
=
5
∘
A
,
c
=
7
∘
A
. If the molar mass of
L
i
B
H
4
is
21.76
g mol
−
1
. The density of the crystal is:
(
N
A
=
6
×
10
23
)
Q.
A
2
B
molecules (molar mass
=
259.8
g/mol ) crystallizes in a hexagonal lattice.The lattice constants are
a
=
5
˚
A
and
b
=
8
˚
A
. If the density of crystal is
5
g cm
−
3
, then how many molecules are contained in a given unit cell? (use
N
A
=
6
×
10
23
)
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