random chem

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
precise

together, but miss the bullseye
accurate

not together, but hit the bullseye with wide limits
neither precise or accurate

all over and miss bullseye
uncertainty

the last # in a measurment is uncertain
density of ice is ___ density of water

<
importants of hydrogen bonding in the density of ice and water

the bonds force the atoms in a molecule apart
chemical change

change in chemical comporition forming a new compund
density
solid___liquid___gas

> >
volume
solid__liquid__gas
- <
- gas has no volume!
density

mass/volume
iron sulfide

Fe+S --> FeS
solid
- definite volume
- not compressable
- no brownian and no surface tension
liquid
- def. volume
- not compressable
- brownian and surface tension
gas
- no volume
- compressable
- brownian
- no surface tension
weight

effect of gravity on mass
mass

amount of matter present in an object
to identify different substances of similar appearance:

smell, density, combustion
distillation
- evaporation of a substance
- (alcohol and water)
decomposition
- seperation by a chemical reaction
- (hydrogen peroxide) h20 and 02
metals and their properties

density,malleable,ductile,luster,titaniable,conductors

Author

Anonymous

127268

Card Set

random chem

Description

sdfghj

Updated

2012-01-12T00:11:32Z

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