5.15gm of Nabr is dissolved in 500ml of water calculate molarity of solutions
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Answer:
molarity=
Litre of solvent
moles of solute
moles of NaBr=
Mass of NaBr
Weight of NaBr
=
102.89
20.6
=0.2
Litre of solution=
1000
Volume of solution
=
1000
500
=0.5
∴molality=
Litre of solvent
moles of solute
=
0.5
0.2
=0.4M
Hence, the correct answer is 0.4.
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