def.: the quantity of matter in a material packed into a unit volume of the material
formula: density = mass / volume
mass
- amt of matter in an obj
- does not change no matter where you go
- measured in g or kg
volume
- amt of space an obj occupies
- for the same amt of space a gas occupies, the vol may be diff bec gases are compressible
- measured in l, ml, cm3 or m3
density question - z grams of x is mixed with w grams of y to obtain a mixture. the volume of this mixture is z cm3. find the density of the mixture.
ans: total mass / total volume = density of the mixture
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