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What is the mass ratio of ethylene glycol (C2H6O2, molar mass = 62 g/mol) required for making 500 g of 0.25 molal aqueous

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What is the mass ratio of ethylene glycol (C2H6O2, molar mass = 62 g/mol) required for making 500 g of 0.25 molal aqueous solution and 250 mL of 0.25 molar aqueous solution ? 

(1) 1 : 1

(2) 3 : 1

(3) 2 : 1

(4) 1 : 2

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Correct option is (3) 2 : 1

Assume : Mass of solvent \(\approx\) Mass of solution

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