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Unknown pressure
Ambient fluid
Fluid of interest
h
W
Reference fluid
density P
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Explanation:
The problem gives you all the information you need in order to solve for the molality and mole fraction of the solution. In order to determine its molarity, you're going to need the solution's volume.
To get the volume, you have to know what the density of the solution is. Determine the percent concentration by mass of the solution first
%w/w=msolutemsolution⋅100
In your case, the mass of the solution will be
msolution=mglucose+mwater
msolution=20+150=170 g
This means that you get
%w/w=20g170g⋅100=11.8%
The density of this solution will thus be
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