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Tardigrade
Question
Chemistry
The empirical formula of a compound is CH2 1 mole of this compound has a mass of 42g . Its molecular formula is:
Q. The empirical formula of a compound is
C
H
2
1 mole of this compound has a mass of
42
g
. Its molecular formula is:
1865
179
Haryana PMT
Haryana PMT 1999
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A
C
2
H
2
B
C
H
2
C
C
3
H
8
D
C
3
H
6
Solution:
Empirical formula weight of
C
H
2
=
12
+
(
1
×
2
)
=
12
+
2
=
14
Mass of 1 mole of the compound = its molecular weight
=
42
n
=
e
m
p
i
r
i
c
a
l
f
or
m
u
l
a
w
e
i
g
h
t
m
o
l
ec
u
l
a
r
w
e
i
g
h
t
=
14
42
=
3
∴
molecular formula = (empirical formula)
×
n
=
(
C
H
2
)
×
3
=
C
3
H
6