# Problem: 30 grams of liquid ethanol, CH3CH2OH, are mixed with 70 g water. The density of pure ethanol is 0.789 g/mL. The density of water is 1 g/mL. What is the molality of the ethanol in this solution?

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###### Problem Details

30 grams of liquid ethanol, CH3CH2OH, are mixed with 70 g water. The density of pure ethanol is 0.789 g/mL. The density of water is 1 g/mL. What is the molality of the ethanol in this solution?

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Based on our data, we think this problem is relevant for Professor Staff's class at CCNY.