1.

What volume of 75% alcohol by mass (d=0.8 g/cm^(3)) must be used to prepare 150cc. Of 30% alcohol by mass (d=0.9g//cm^(3))?

Answer»

44.44mL
56.25mL
67.5mL
33.56mL

Solution :Let v mL of ALCOHOL was USED.
`(75)/(100)xxVxx0.8=(30)/(100)xx150xx0.9`
V=67.5mL


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