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Chapter

Ch 1


Department
Chemistry
Course Code
CHEM 1201
Professor
All

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Chapter 1
Intro/Sig Figs
0.00008 (How many sigs) 1
2.334 x 3.0 = ?
(8.00 m)(100 cm/m)(1 in./2.54 cm) = ?
Types of Properties- Characteristics
Physical Properties…
Can be observed without changing a substance into another
substance.
Ex: Boiling point, density, mass, volume, etc.
Q: Which of the following is a physical property?
I. color
II. hardness
III. freezing point
IV. Density
A: _E_
a. I & III
b. IV only
c. III & IV
d. II, III & IV
e. All
color, temperature

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Chemical Properties…
Can only be observed when a substance is changed into another
substance. Rxn
Ex: Flammability, corrosiveness, reactivity with acid, etc.
Q: Which of the following is a chemical property?
I. volume
II. mass
III. melting point
IV. flammability
A:_B_
a. I & III
b. IV only
c. III & IV
d. II, III & IV
e. All
Types of Changes
Physical Changes
-Physical change occurs when a substance changes shape, size or color.
This change does not affect the overall composition of the substance.
Ex: Changes of state (s, l, g), grinding coffee, liquid evaporating, melting
butter, cutting paper, freezing water, molding clay
Q: Which of the following is a physical change?
I. Chopping wood
II. Burning wood
III. Freezing water
IV. Snow melting
A:_D_
a. I & III
b. II only
c. III & IV
d. I, III & IV
e. All
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