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Byju's Answer
Standard IX
Chemistry
Mole Concept & Avogadro Number
720 g of wate...
Question
720 g of water contains ______ moles of water.
A
20
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B
40
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C
60
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D
80
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Solution
The correct option is
B
40
Given, mass of
H
2
O
=
720
g
We know that, molar mass of water =
18
g
/
m
o
l
Moles of water
=
Mass of water
Molar mass of water
=
720
18
=
40
m
o
l
e
s
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