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In which of the following solutions would a piece of polystyrene float? 5 7 . 9 % v v ethanol water 3 8 % v

In which of the following solutions would a piece of polystyrene float?

57.9 % \frac{v}{v}

ethanol

water

38 % \frac{v}{v}

ethanol

31 % \frac{w}{w}

potassium carbonate

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