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Byju's Answer
Standard X
Chemistry
Mole Concept and Avogadro's Number
Which one of ...
Question
Which one of the following contains minimum number of atoms? [All volumes are at same conditions of pressure and temperature ]
(1) 1gm of CO2
(2) 1gm of C8H18 (3) 1gm of C2H6. (4) 1gm of B4H10
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Solution
(1)
1
g
m
of
C
O
2
=
1
mol
C
O
2
44
gm of
C
O
2
×
6.023
×
10
23
atoms
1
mol of
C
O
2
=
0.13
×
10
23
atoms
(2)
1
g
m
of
C
8
H
1
8
=
1
mole
C
8
H
18
114
g
m
of
C
8
H
18
×
6.023
×
10
23
a
t
o
m
s
1
mol of
C
8
H
18
=
0.05
×
10
23
atoms
(3)
1
g
m
of
C
2
H
6
=
1
mole
C
2
H
6
30
g
m
of
C
2
H
6
×
6.023
×
10
23
a
t
o
m
s
1
mol of
C
2
H
6
=
0.2
×
10
23
atoms
(4)
1
g
m
of
B
4
H
10
=
1
mole
B
4
H
10
53.32
g
m
of
B
4
H
10
×
6.023
×
10
23
a
t
o
m
s
1
mol of
B
4
H
10
=
0.1
×
10
23
atoms
From above values, we can conclude that Option B
1
g
m
of
C
8
H
18
has less number of atoms.
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