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-100ml of ethylalcohol is made upto alitre with distilled water. If the density ofC2H5OH is 0.46 gr/ml. then its molality is |
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Answer» Answer: 10/9 m Explanation: Mass of ETHANOL = Volume × Density = 100 ml × 0.46 g/ml = 46 g Moles of ethanol = Mass / Molar mass = 46 g / (46 g/MOL) = 1 mol Volume of water in the solution = 900 ml Density of water = 1 g/ml Mass of water = Volume × Density = 900 ml × 1 g/ml = 900 g = 0.9 kg Molality = Moles of solute / kg of solvent = Moles of Ethanol / (kg of water) = 1 mol / (0.9 kg) = 10/9 m |
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