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Ques3. How many moles are present in 4 gram of sodium hydroxide? (atomic mass of
[
sodium=23 u, oxygen= 16 u and hydrogen = 1u).
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Explanation:
NaOH Sodium hydroxide
Gram molecular Mass=Mass of Na+Mass of O+Mass of H
=23+16+1
=40g
Given mass=160g
No. of moles=
Gram Molecular Mass
_________________
Given mmas
=40
___
160
=4 mol
The moles of NaOH contained in 160g of it is 4 mole
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