random chem

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Author:
Anonymous
ID:
127268
Filename:
random chem
Updated:
2012-01-11 19:11:32
Tags:
dfghj
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sdfghj
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  1. rules for sig digs
    • -all digits except 0 are significant
    • -if 0's fall between 2 digits, all digits are significant
    • -a 0 at the end of a # is only significant if it shows a degree of accuracy
  2. precise
    together, but miss the bullseye
  3. accurate
    not together, but hit the bullseye with wide limits
  4. neither precise or accurate
    all over and miss bullseye
  5. uncertainty
    the last # in a measurment is uncertain
  6. density of ice is ___ density of water
    <
  7. importants of hydrogen bonding in the density of ice and water
    the bonds force the atoms in a molecule apart
  8. chemical change
    change in chemical comporition forming a new compund
  9. density
    solid___liquid___gas
    > >
  10. volume
    solid__liquid__gas
    • <
    • gas has no volume!
  11. density
    mass/volume
  12. iron sulfide
    Fe+S --> FeS
  13. solid
    • definite volume
    • not compressable
    • no brownian and no surface tension
  14. liquid
    • def. volume
    • not compressable
    • brownian and surface tension
  15. gas
    • no volume
    • compressable
    • brownian
    • no surface tension
  16. weight
    effect of gravity on mass
  17. mass
    amount of matter present in an object
  18. to identify different substances of similar appearance:
    smell, density, combustion
  19. distillation
    • evaporation of a substance
    • (alcohol and water)
  20. decomposition
    • seperation by a chemical reaction
    • (hydrogen peroxide) h20 and 02
  21. metals and their properties
    density,malleable,ductile,luster,titaniable,conductors

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