Transcript Properties of Matter

Standards: SPS2a, d, e
 The mass per unit volume of a substance.
 Density will always stay the same for a substance under
normal conditions.
 What does the density of a substance tell a person?
 It will determine if the substance will float or sink in
another substance.
If a substance floats in another substance, it is less dense
than the other substance.
If a substance sinks in another substance, it is more dense
than the other substance.
 Formula Density= mass
volume
 d= m
V
 1) Which of the following is a physical property?
 A. Combustibility
 C. Reactivity
B. Density
D. Corrosion
 2) A piece of carbon has a mass of 14.0 g. The carbon
is put into a beaker of water with a volume of 25 mL,
and the volume of water goes up to 31.2 mL. What is
the density of the carbon?
 3) A unknown substance has a volume of 40.75 mL.
Determine the mass of the substance if it has a density
of 0.69 g/mL
 4) A group of physical science students made some
observations about a metal sample during lab.
Shiny reddish-brown color
Mass- 25.18 g
Volume- 2.81 cm3
The students were working with four metals. They
included:
Magnesium - density 1.74 g/cm3
Aluminum - density 2.7 g/cm3
Copper - density 8.96 g/cm3
Silver - density 10.5 g/cm3
What is the identity of the metal?
 A. Magnesium
 B. Aluminum
C. Copper
D. Silver
Review- Physical
Science
5) Which of the
substances is the
least dense?
 6. Which of the following is an example of a chemical
change?
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A.
B.
C.
D.
An ice cube melting
A person cooking an egg
Cutting a box in half
A metal conducting electricity
 7. A ping pong ball will float in a tank full of water
and a bouncy ball will sink in a tank full of water.
Which one is denser?
 8. A piece of metal has a density of 0.94 g/cm3. Will
the metal float or sink when put in a tank of water?
(Water has a density of 1.00 g/cm3.)
 Law that states that mass/matter is neither created
nor destroyed in a chemical reaction.
 It also states that the total mass of the reactants always
equals the total mass of the products.
 This means that the left-hand side of the equation will
be equal to the right-hand side of the equation.
 Ex:
 Burning a piece of wood
 Chemical Formula A shorthand way for identifying a compound using
symbols that represents elements that make up the
compound.
 1. You are given a substance to do an experiment on.
The volume of water and the substance in a graduated
cylinder is 17.8 mL, and the volume of water in the
cylinder is 10 mL. You find the mass of the substance
to be 5.1 g. Find the density of the substance.
 2. You are given 2 pieces of platinum. One is a tiny
piece of platinum (Mass- 24.9 g, Volume- 1.17 cm3) and
the other piece of platinum is the size of a potato
(Mass- 148.0 g, Volume- 6.95 cm3). Does the density of
platinum change?
 3. Block X and Block Y have the same mass. Both
blocks are placed into a container of pure water. Block
X floats in water, and Block Y sinks to the bottom of
the container.
 Which of the following statements is an accurate
conclusion from this demonstration?
 A. Block Y is heavier than Block X.
 B. Block Y is less dense than Block X.
 C. Block Y has a smaller volume than Block X.
 D. Block Y would float if more water were added.
 4. How many total atoms are in 4C7H6O2?
 5. How many Cu atoms are found in the reactants of
the following equation?
 2Cu2O + C  4Cu + CO2
 6. How many atoms of each element are found in the
following chemical equation?
 CH4 + 2O2  CO2 + 2H2O
 CC HH OO-
 7. Answer question Number 4 from the EOCT Study
Guide.
 8. A student does an experiment on a sample of
titanium. She found the mass of the sample of
titanium was 47.6 grams and the volume of the sample
was 10.5 mL. What is the density of the sample of
titanium?
 9. Condensation that occurs on a glass of tea left on
the table is an example of a ______________________.
(Physical Change or Chemical Change)
 10. Why do the reactants of an equation always equal
the products of an equation when a chemical reaction
occurs.
 For the following 5 chemical equations, list the type of
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chemical reaction that is taking place. (Synthesis,
Decomposition, Single-Replacement, DoubleReplacement)
1. C + 2F2  CF4
2. 2H2O  2H2 + O2
3. AlBr3 + 3K  3KBr + Al
4. 4Al + 3O2  2Al2O3
5. 2NaF + SCl2  SF2 + 2NaCl
 1) A graduated cylinder with water in it has a volume
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of 25 mL, and the volume of the graduated cylinder
with water and a cube of ice in it has a volume of 28.9
mL. The mass of the cube of ice is 3.6 g. What is the
density of the ice cube?
Balance the following chemical equations and name
what type of reaction is occurring.
2) ___N2 + ____O2  ____NO2
3) ___Mg + ____CrO3  ____MgO + ____Cr
4) ___NH3  ___N2 + H2
 5) Grilling a steak is an example of a
_________________. (Physical or Chemical Change)
 6) How many total atoms are in 3CH3OH?
 C H O Total-
 7) Is any matter being created or destroyed when an
apple is decaying? What law states why?