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chemistryChapter2
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base unit of time
seconds
base unit of temperature
Kelvin
base unit of amounts of substances
mole
base unit of electric current
ampere
base unit of luminous intensity
candela
density
derived units; volume/mass
cubic meter
1m cublic centimeters; 100^3
volume units
length^3
difference between mass and weight
mass ignores gravity
density of pure substances
intensive property; doesn't depend on amount present
calculating density
mass/volume; keep units straight
converting volume units
use conversion factors; 1 meter=100 centimeters; 1 cubic meter=1,000,000 cm
difference between theory and hypothesis
theory is well tested; hypothesis is a testable statement
difference between precision and accuracy
accuracy is closeness to accepted; precision is closeness of experimental values
significant figures
all known digits plus one extra
adding rule with sig figs
answer is accurate to most specific place value in least specific number
multiplying with sig figs
number of sig figs in answer=number of sig figs in least specific number
accuracy of a measurement
closeness to accepted value
percent error
(accepted value-experimental value)/ accepted value
inversely proportional
product of two values remains constant
Author
dimeng
ID
313338
Card Set
chemistryChapter2
Description
chapter 2
Updated
2015-12-17T02:23:40Z
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