DENSITY
How to measure and calculate
REVIEW
Density is the amount of matter in a given area
We calculate it by
_Mass_
Density =
Volume
Common units:
Mass = g
Volume = ml or cm3
Density = g/ml or g/cm3
PRACTICE PROBLEMS
1. If a block had a mass of 3.45g and volume of 290
ml, what is its density?
2. A mysterious liquid is 500.5 ml and weighs
3 x 105g. What is its density?
3. A bar of soap’s mass is 0.05kg and has a volume
of 2.3 x 102 cm3. What is its density?
4. A really smelly block of cheese has the mass of
2.045 x 1012 ng. It’s volume is 400 cm3? What is
its density?
MORE PRACTICE!
A silver bell has the volume of 5.945 cm3. The
density of silver is 10.5 g/cm3. What is the mass of the
bell?
6. A salt shaker contains 1.23 x 102 ml of salt. The
density of salt is 2.16 g/cm3. What is the mass of the
salt?
7. A gold ring weighs 1.09 x 105 g. The density of gold
is 19.32 g/ml. What is the volume of the gold ring.
8. The density of lead is 11.34 g/cm3. A lead bar weights
3.49 x 10-3 Mg. What is the volume of the bar?
5.
HOMEWORK
Read chapter 2.8
At the end of the chapter answer #83-85, 87, 90,
Do #91 (but pretend all mass unit are g and all
volume are ml or cm3), 93, 94