Question

Milan is measuring the density of ethanol. He weighs a bottle three times:

first, empty; then filled with water; then filled with ethanol. Here are his
results:
mass of empty bottle = 30.0g
mass of bottle filled with water = 90.0g
mass of bottle filled with ethanol = = 78.0g
i Calculate the volume of the bottle.

Answer 1

Density of ethanol
`=0.789g/cm^3`

Mass of ethanol
`=78-30=48g`

`Density = (Mass)/(Volume)`

`Volume = (Mass)/(Density)`

`Volume = (48)/(0.789)`

`Volume = 68.83cm³`

Answer 2

• Mass of ethanol=78-30=48g
• Density of ethanol=0.789g/cm^3

`\\ \tt\hookrightarrow Density=(Mass)/(Volume)`

`\\ \tt\hookrightarrow Volume=(Mass)/(Density)`

`\\ \tt\hookrightarrow volume=(48)/(0.789)`

`\\ \tt\hookrightarrow Volume=68.83cm^3`