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Standard IX
Chemistry
Molecular Mass
Calculate the...
Question
Calculate the molecular mass (u) of Sulphuric acid (
H
2
S
O
4
).
A
96
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B
97
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C
98
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D
49
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Solution
The correct option is
C
98
Molecular mass (u) of Sulphuric acid (
H
2
S
O
4
) = 2 x mass of H atom + mass of S atom + 4 x mass of O atom
=
2
×
1
+
32
+
4
×
16
=
98
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0
Similar questions
Q.
Concentrated aqueous sulphuric acid is
98
%
H
2
S
O
4
by mass and has a density of
1.80
m
g
L
−
1
. Find the Volume of acid required to make one liter of
0.1
M
H
2
S
O
4
solution.
Q.
Calculate the percentage of sulphur in
H
2
S
O
4
.
Q.
(a) What is the mass of one molecule of
H
2
S
O
4
? (b) What is the molecular mass of
H
2
S
O
4
? (c) What is the gram molecular mass of
H
2
S
O
4
?
Q.
How many gm of
H
2
S
O
4
of density 1.84
/
containing 95.6 mass % of
H
2
S
O
4
should be added to 1 L of 40 mass % solution of
H
2
S
O
4
of density 1.31
g
/
l
in order to prepare 50 mass % solution of sulphuric acid of density 1.4
g
/
l
Q.
Calculate the equivalent mass of
H
2
S
O
4
from the given reactions.
(
a
)
H
2
S
O
4
+
N
a
O
H
→
N
a
H
S
O
4
+
H
2
O
(
b
)
H
2
S
O
4
+
2
N
a
O
H
→
N
a
2
S
O
4
+
2
H
2
O
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