CHAPTER 1 numerate AND MEASUREMENT
CONTENTS
INTRODUCTION 2) PROPERTIES AND CHANGES OF MATTER 3) SIGNIFICANT FIGURES 4) ACCURACY VERSUS PRECISION
1)
INTRODUCTION
Chemistry is the study of matter and the changes it undergoes.
a. b. c.
i. ii.
event: anything that has mass and occupies space Substance: form of matter that has a definite composition and distinct properties Mixture: combination of 2 or more sums in which the substances retain their distinct identities
akin: composition same throughout Heterogeneous : composition non uniform
d.
e.
Element: made of the same kind of atom; canonical substance that can not be broken by any physical and chemical means to simpler substances Compound: containing dickens or more elements
CLASSIFICATION OF MATTER
The Study of Chemistry
THE THREE STATES OF MATTER
bungle GAS: Loose structure
SOLID: Rigid structure
solid liquidness LIQUID: Less Rigid Structure
PROPERTIES AND CHANGES OF MATTER
Physical Properties:
o
Can be observed without changing a substance into another substance.
boiling point, density, mass, volume.
Chemical Properties:
o
Can only be observed when a substance is changed into another substance.
Flammability, corrosiveness, reactivity with acid.
Intensive Properties:
o
Independent of the measuring of the substance that is present.
Density, boiling point, color.
Extensive Properties:
o
Dependent upon the amount of the substance present.
Mass, volume, energy.
CHANGES OF MATTER
Physical Changes:
?
does not alter the composition or identicalness of a substance.
Changes of state, temperature, volume, etc.
Chemical Changes:
?
alters the composition or identity of the substance(s) involved.
Combustion, oxidation, decomposition, etc.
UNITS OF MEASUREMENT
SI UNIT
International System of Units (SI)
METRIC SYSTEM
VOLUME:
1 cm3 = (1 x 10-2 m)3 = 1 x 10-6 m3 1 dm3 = (1 x 10-1 m)3 = 1 x 10-3 m3 1...If you want to get a full essay, order it on our website: Orderessay
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