3. per cent by volume/volume (volume/volume, percent% v/v) is the volume of the melted says that exist in the solution volume, unit 100. Ethanol (C2H6O) 10 to 90 cm3 cm3 + water becomes 100 cm3 aqueous solution, this solution has a concentration 10 per cent by volume/volume or 10% v/v.3.1 if the 50 cm3 aqueous solution, there are a few grams are soluble C2H6O (density of 0.8 g/cm3 = pure C2H6O)How to make a * solution with concentration of 10% v/v. 100 cm 3 solution is C2H6O is 10 cm3 melt. 50 cm3 aqueous solution contains dissolved is C2H6O 6 = 5.00 cm3. * The density of 0.8 g/cm3 = pure C2H6O. C2H6O 1 cm3 = 0.8 g hard C2H6O 5 x 5 g heavier = 0.8 cm3 = 4.0 g
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