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Unformatted text preview: derived unit. It can be expressed in terms of length cubed because for rectangular solids
volume is equal to length times width times height all of which have the base unit meters.
volume = length × width × height = length 3
volume = m × m
× m = m3
The SI unit for volume is the cubic meter (m3 ) which is the volume of a cube 1 m on each edge. This unit is
too large and related units such as the cubic centimeter (cm3 ) and cubic decimeter (dm3 ) are often used.
Volumes of fluids are usually measured in liters (L). A liter is roughly the size of a quart (1.06 qt). A liter
is the volume of a cube with an edge of 10 cm, and therefore is 1000 cm 3 . The volume unit you are most
likely to use in chemistry is the milliliter (mL). One mL is 0.001 L, and so 1000 mL equal 1 L. Since 1 L =
1000 cm3 = 1000 mL, then one milliliter (mL) is equal to one cubic centimeter (cm3 ).
1 mL = 1 cm3 Density. Density is an important physical property of objects and substances. The density of an object is
defined as the ratio of its mass to its volume.
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- Spring '08