click below
click below
Normal Size Small Size show me how
Gen Chem Unit 1
Term | Definition |
---|---|
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 |