what is the density of the unknown liquid?
Calculate the mass of the liquid only.
Mass of the container: 20.35 grams
For volume 1mL: 21.16 - 20.35 = .81
For volume 2mL: 21.97 - 20.35 = 1.62
For volume 3mL: 22.78 - 20.35 = 2.43
For volume 4mL: 23.59 - 20.35 = 3.24
For volume 5mL: 24.40 - 20.35 = 4.05
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Density can be measured as the amount of the substance in mass over the volume it occupies. Generally it is represented as grams per mL (`g/(mL)` ). I believe this is a laboratory experiment and the figures are pretty much straightforward. To get the values of the densities of the compound, you just substitute the amount in mass and the volume of the liquid.
`(0.81 g)/(1 mL) = 0.81 g/(mL)`
`(1.62 g)/(2 mL) = 0.81 g/(mL)`
`(2.43 g)/(3 mL) = 0.81 g/(mL)`
`(3.24 g)/(4 mL) = 0.81 g/(mL)`
`(4.05 g)/(5 mL) = 0.81 g/(mL)`
Obviously the average density of the unknown compound is 0.81 g/mL.
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