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Gen Chem Unit 1

TermDefinition
macroscopic large
microscopic small
Homogeneous (solution) composition is uniform
Heterogeneous composition is NOT uniform throughout (sand)
Physical Property observed without changing identity
Chemical Property observed when it goes through reaction, identity is changed
Extensive Property extends, depends on amount of material (mass, length)
Intensive Property fixed value, independent of amount (density, color)
Physical Change looks different but substance is same (phases of matter)
Chemical Change chemical formula has changed (reaction)
nano -9 (n)
micro -6 (u)
milli -3 (m)
cente -2 (c)
kilo +3 (k)
mega +6 (M)
giga +9 (G)
volume= length x length x length
density= mass/volume
accuracy how close to real value
precision how close to other measurements
exact numbers counted numbers, no uncertainty
inexact numbers measured number, uncertainty
Popular Chemistry sets

 

 



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