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Physical Properties of Matter

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by

Robert Nelson

on 30 September 2013

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Transcript of Physical Properties of Matter

Physical Properties of Matter
Units Used for Density
There are a couple of different units used for density.
The state of matter determines which unit we use.
The units are a combination unit, that is they combine two units to make a unique new unit.
For density, theunit will combine mass and volume.
Density Problems
The Property of Density
Density is a measurement of how much matter is in a given volume.
What is a physical property?
A physical property of matter is a characteristic property that can be observed or measured without changing what the matter is. That is... the change in the property is reversible. What do you think are some physical properties of matter?
You should be able to do the following....
1. Describe what a physical property is and give at least 3 examples.
2. Be able to use the density triangle to solve density word problems.
3. Be able to determine if something will float in water.
4. Be able to describe how to make something
with a density >1 float in water.
Examples of Physical Properties
1. Ductility (able to be made into wire)
2. State of Matter
3. Solubility (the ability to dissolve/be dissolved)
4. Magnetism
5. Conductance
6. Density
7. Malleability (the ability to be shaped)
The formula for density is.....
m
____
V
d =
"d" is density, "m" is mass, "V" is volume
For a Liquid or Gas
We use the unit g/mL
For a Solid
We use the unit g/cc
For the Mass
We use g or grams
For the Volume
We use mL (for a liquid) and
cc (for a solid)
Please try to solve the following problems. They will be answered for you.
You may use a calculator if you need to.
What is the density of a solid object with a volume of 15cc and a mass of 45g?
What is the mass of a liquid with a density of 7.5 g/mL and a volume of 2mL?
What is the volume of an object with a density of 15g/cc and a mass of 60g?
1. d = m / V
2. d = 45g / 15cc
3. d = 3g/cc
1. m = d x V
2. m = 7.5g/mL x 2mL
3. m = 15g
1. V = m/d
2. V = 60g/15g/cc
3. V = 4cc
Floating and Sinking
Density determines what will float and what won't.
Pure water (not tap water) has a density of 1g/mL
If an object has a density <1g/mL, it will float in water.
If an object has a density >1g/mL, it will sink in water.

Look carefully at this video
Which color is most dense?Least dense?
Full transcript