chem. chapter 2
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thermodynamic temperature


metric system
system instrumental

velocity (speed)
length/time



density
mass per unit volume

density is measured in....

dm3=...
1L=1000dm3=1000mL

density of water at 25 degrees C=
1.00 g/cm3

4 rules of significant digits
 digits other than 0 are always significant
 1 or more final 0s used agter the dec are alwats significant
 0s between 2 other significant digits are significant
 0s used solely for spacing the sec are not significant

significant digits rule in chemistry
every math prob will have an answer in 3 significant digits

when a number has five or more places....
use scientific notation

accuracy
how close a measurement is to its actual exact value

precision
how close a set of measurements are to each other

% error
copoares your experimental value to a known value

% error equation
your valueknown value/known value x 100

qualitive measures
when you describe an object without using meausrements

quantitive measures
when you sescribe an object using measurements

temperature
 the measurements of the average kinetic energy of particles in an object
 the higher the kinetic energy, the higher the temp.

heating
the process in which kinetic energy is in increased