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Byju's Answer
Standard IX
Physics
Relative Density
How many gram...
Question
How many grams of
N
a
O
H
should be dissolved to make
100
c
m
3
of
0.15
M
N
a
O
H
Solution?
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Solution
In 100 mL of 0.5 M NaOH solution, there are
100
m
l
×
0.5
m
o
l
N
a
O
H
=
50
m
m
o
l
o
f
N
a
O
H
Molar mass of NaOH = 40 g/mol NaOH
Mass of NaOH in 50mmol
=
50
×
10
−
3
×
40
g
=
2
g
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