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A solution is made using 90.1 g of dimethyl ether (MM = 46.07 g/mol) and 110.0 g of methanol (MM = 32.04 g/mol). What is the molality of the dimethyl ether in the solution?
Transcribed Image Text:A solution is made using 90.1 g of dimethyl ether (MM = 46.07 g/mol) and 110.0 g of methanol (MM = 32.04 g/mol). What is the molality of the dimethyl ether in the solution?
Expert Solution
Step 1

Given:

The molar mass of dimethyl ether = 46.07 g/mol

The mass of dimethyl ether = 90.1 g

The Mass of the methanol = 110 g

Step 2

On calculating the molality of dimethyl ether as follows,

Molality of solute =Number of moles of solute present in the solutionmass of solvent (in kg) present in the solution

 

 46.07 g of dimethyl ether = 1 mole of dimethyl ether

Hence,

90.1 g of dimethyl ether = [1mole/46.07 g/1 g of dimethyl ether]×90.1 g of dimethyl ether

 

 

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