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Standard XII
Chemistry
Empirical & Molecular Formula
What is the m...
Question
What is the molecular formula of a compound with the empirical formula
C
3
H
6
O
2
and a mass of 148 amu?
A
C
6
H
12
O
4
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B
C
3
H
6
O
2
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C
C
9
H
18
O
6
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D
None of the above
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Solution
The correct option is
A
C
6
H
12
O
4
M
o
l
e
c
u
l
a
r
f
o
r
m
u
l
a
=
E
m
p
i
r
i
c
a
l
f
o
r
m
u
l
a
×
n
−
f
a
c
t
o
r
Also,
M
o
l
a
r
m
a
s
s
o
f
M
F
=
M
o
l
a
r
m
a
s
s
o
f
E
F
×
n
−
f
a
c
t
o
r
M
o
l
a
r
m
a
s
s
o
f
M
o
l
e
c
u
l
a
r
f
o
r
m
u
l
a
=
148
a
m
u
(given)
M
o
l
a
r
m
a
s
s
o
f
E
m
p
i
r
i
c
a
l
f
o
r
m
u
l
a
(
C
3
H
6
O
2
)
=
36
+
6
+
32
=
74
u
So,
148
=
74
×
n
−
f
a
c
t
o
r
2
=
n
−
f
a
c
t
o
r
∴
M
o
l
e
c
u
l
a
r
f
o
r
m
u
l
a
=
2
×
(
C
3
H
6
O
2
)
=
C
6
H
12
O
4
Suggest Corrections
1
Similar questions
Q.
Give the empirical formula of:
Benzene
(
C
6
H
6
)
Glucose
(
C
6
H
12
O
6
)
Acetylene
(
C
2
H
2
)
Hydrogen per oxide
(
H
2
O
2
)
Q.
Molecular formula
C
3
H
6
B
r
2
can have:
Q.
What is the molecular formula for a compound that has an empirical formula of
C
3
H
7
and a molar mass of
86.2
g
/
m
o
l
?
Q.
Consider the following sequence of reactions :
[A]
(
C
3
H
9
N
)
N
a
N
O
2
/
H
C
l
⟶
[
B
]
(
C
3
H
8
O
)
H
2
S
O
4
−
−−−−
→
K
r
C
r
2
O
7
(
C
3
H
6
O
2
)
[
C
]
The compound [A] is :
Q.
Aspirin
(
C
9
H
8
O
4
)
is prepared by reacting salicylic acid
(
C
7
H
6
O
3
)
and acetic anhydride
(
C
4
H
6
O
3
)
.
C
7
H
6
O
3
+
C
4
H
6
O
3
→
C
9
H
8
O
4
+
C
2
H
4
O
2
How many moles of salicylic acid should be used to prepare six 5-grain aspirin tablets? (1 g = 15.5 grains)
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