Ethanol has a molecular mass of 46 and a density of 0.79 g/mL. A bottle of wine has an alcohol (ethanol) concentration of 12% v/v. What is the molar concentration of ethanol in this bottle? Give your answer to 2 decimal places.
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Expert's answer
2017-11-22T13:41:06-0500
For 1 L of solution: Volume of ethanol: 1000 ∙ 0.12 = 120 mL Mass of ethanol: 0.79 ∙ 120 = 94.8 g Amount of ethanol: 94.8 / 46 = 2.06 mol So, the concentration of ethanol: 2.06 mol/L = 2.06 M Answer: 2.06 mol/L = 2.06 M
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