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The "proof" of an alcoholic beverage is twice the volume percent of ethyl alcohol, C2H5OH in water. The density of ethyl alcohol is 0.789g/ml and that of water is 1.00g/ml. A bottle of 100 proof rum is left outside on a cold winter day.
a.) Will the rum freeze if the temperature drops to -18 degrees celsius?
b.) Rum is used in cooking and baking. At what temperature does 100 proof rum boil?

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  1. hint, 100 proof rum is 50% alcohol and 50% water.

    a 1L bottle of 100 proof rum has (789/2) = 394.5g of alcohol and 500g of water.

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