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3.85 g of ethanol, C2H6O, are dissolved into 200.0 g of water. What is the molality...

3.85 g of ethanol, C2H6O, are dissolved into 200.0 g of water. What is the molality of this solution?

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Answer #1

Ethanol molar mass = 46.07 g/mol

So, 46.07 g in 1000 mL = 1M

3.85 g in 1000 mL = (3.85 / 46.07) M = 0.084 M

3.85 g in 1 mL = (0.084) /(1000) M = 0.000084 M

3.85 g in 200 mL = (0.000084 x 200) M = 0.0168 M = 1.68 x 10-2 M

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