Don't know.
According to Google, the density of ethanol ("alcohol") is 789 kg/m³.
So if the liquid has a density of 750 kg/m³, i.e. it is less than the density of ethanol, it must be something else. If ethanol is mixed with water, the density goes up, i.e. ≥ 789 kg/m³.
See also
http://wissen.science-and-fun.de/chemistry/chemistry/density-tables/ethanol-water-mixtures/
for confirmation.
Question
A mixture of alcohol and water has the density 750 kg m 3.calculate the ratio in the mixture of alcohol to water by i.mass ii.volume
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