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Chem Ch 1.txt
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Chemisty
the study of matter
matter
anything that occupies space & has mass
Inorganic Chemistry
studies materials made from elements (compounds)
Organic Chemistry
study of compounds of the elements of C, H, N, O
Biochemistry
study of compounds in living systems
Physical Chemistry
trying to understand why a matter does what it does
Scientific Method Step 1
Run Experiments; gather data; make observations
Scientific Method Step 2
Explain observation; write hypothesis
Scientific Method Step 3
Test hypothesis; do more experiments
Scientific Method Step 4
Define Hypothesis; form a theory
theory
a well tested hypothesis
law
a fact that is always true (not an explaination)
2 classifications of matter
mixture & pure substance
mixture
a variable composition of matter
2 types of mixture
homogenous & heterogenous
homogenous
same comopsition within mixture
heterogenous
different compostion within a mixture
pure substance
a fixed composition of matter
2 types of pure substances
elements & compounds
elements
cannot be decomposed to smaller composition
compounds
can be chemically decomposed to smaller compositions
molecules
The smallest amount of a pure substance that still has the properties of that pure substance
atom
the building blocks of molecules
2 properties of matter
physical & chemical
physical properties
can be observed without a change in composition (solid->liquid)
chemical properties
composition must change to observe material changing to a different substance
significant figures
accurately measured quantity with uncertainty in the last digit
kilo
(k) 1000 x g
centi
( c ) g/100
milli
(m) g/1000
micro
(u) g/10^6
density
mass/volume (g/ml if solid or liquid) (g/l if gas)
temperature formula
F=(9/5 x C)+32
Kelvin Temperature
the absolute temperature scale C= K-273
Author
tmgordy
ID
33184
Card Set
Chem Ch 1.txt
Description
Chem Ch 1
Updated
2010-09-07T14:35:11Z
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