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Byju's Answer
Standard XII
Chemistry
Mole Concept
Find the numb...
Question
Find the number of moles of
N
a
2
C
O
3
which contain 4.5 moles of oxygen atoms.
A
1.0 mol
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B
1.5 mol
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C
4.5 mol
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D
None of these
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Solution
The correct option is
B
1.5 mol
From the molecular formula of
N
a
2
C
O
3
,
one mole of sodium carbonate contains 3 moles of O atom.
The number of moles of sodium carbonate that contain 4.5 moles of O atoms =
1
×
4.5
3
=
1.5
m
o
l
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