A bottle of wine contains 12.5% ethanol by volume. The density of ethanol (C2H5OH) is 0.789 g/cm3. Calculate the concentration of ethanol in wine in terms of mass percent and molality.
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A bottle of wine contains 12.5% ethanol by volume. The density of ethanol (C2H5OH) is 0.789 g/cm3. Calculate the concentration of ethanol in wine in terms of mass percent and molality. 12.5% by volume means 12.5 mL ethanol/100 mL of solution.
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Answer:volume ( c2 H5OH) = 112,5%
density 0,7789g/mL
Density = m/v
0,789 = m/112,5
m= 9,862g
n= m/Mr
=9,862g/46,07
=0 ,214 mol
C = n/v
C = 0,214/ 12,5
C =0, 0017 m
Explanation:firstly have lolook for a Mass . Then calculate the number of moles where you will be able to find Concentration
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