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Byju's Answer
Standard IX
Chemistry
Molecular Mass
Write the nam...
Question
Write the names of the following compounds and deduce their molar masses.
N
a
2
S
O
4
,
K
2
C
O
3
,
C
O
2
,
M
g
C
l
2
,
N
a
O
H
,
A
l
P
O
4
,
N
a
H
C
O
3
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Solution
N
a
2
S
O
4
: Sodium sulphate
Molar Mass :
23
(
2
)
+
32
+
16
(
4
)
=
46
+
32
+
64
=
142
g/mol
K
2
C
O
3
: Potassium carbonate
Molar Mass :
39
(
2
)
+
12
+
16
(
3
)
=
78
+
12
+
48
=
138
g/mol
C
O
2
: Carbon dioxide
Molar Mass :
12
+
16
(
2
)
=
12
+
32
=
44
g/mol
M
g
C
l
2
: Magnesium chloride
Molar Mass :
24
+
35.5
(
2
)
=
95
g/mol
N
a
O
H
: Sodium hydroxide
Molar Mass :
23
+
16
+
1
=
40
g/mol
A
l
P
O
4
: Aluminium phosphate
Molar Mass :
27
+
31
+
16
(
4
)
=
27
+
31
+
64
=
122
g/mol
N
a
H
C
O
3
: Sodium bicarbonate
Molar Mass :
23
+
1
+
12
+
16
(
3
)
=
23
+
1
+
12
+
48
=
84
g/mol
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Similar questions
Q.
Write the names of the following compounds and deduce their molecular masses.
Na
2
SO
4
, K
2
CO
3
, CO
2
, MgCl
2
, NaOH, AlPO
4
, NaHCO
3
Q.
What coefficients is needed for
N
a
H
C
O
3
to balance the following equation?
N
a
H
C
O
3
→
N
a
2
C
O
3
+
H
2
O
+
C
O
2
Q.
Balance the following equation by oxidation number method
i)
K
2
C
r
2
O
7
+
K
I
+
H
2
S
O
4
→
K
2
S
O
4
+
C
r
2
(
S
O
4
)
3
+
I
2
+
H
2
O
ii)
K
M
n
O
4
+
N
a
2
S
O
3
→
M
n
O
2
+
N
a
2
S
O
4
+
K
O
H
iii)
C
u
+
H
N
O
3
→
C
u
(
N
O
3
)
2
+
N
O
2
+
H
2
O
iv)
K
M
n
O
4
+
H
2
C
2
O
4
+
H
2
S
O
4
→
K
2
S
O
4
+
M
n
S
O
4
+
C
O
2
+
H
2
O
Q.
25
g
m
mixture of
N
a
2
C
O
3
and
N
a
2
S
O
4
are dissolved in
250
m
l
of solution.
25
m
l
of above solution required
20
m
l
of
0.1
N
H
2
S
O
4
using phenolphthalein indicator. The mass of
N
a
2
C
O
3
in the mixture is:
Q.
A solution contain
N
a
2
C
O
3
and
N
a
H
C
O
3
. 10 ml of this solution required 2.5 ml of 0.1 M
H
2
S
O
4
for neutralization using phenolphthalein as indicator. Methyl orange is then added when a further 2.5 ml of 0.2 M
H
2
S
O
4
was required. The amount of
N
a
2
C
O
3
and
N
a
H
C
O
3
in 1 litre of the solution is ?
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