Fundamentals of Chemistry

Accuracy
How close the measurement is to the “True Value”
when is a zero significant?
*when its betweenother digits
*when its to the right of a digit AND to the right of the decimal
How many sig figs?
0.04060
4
How many sig figs?
0.0078
2
How many sig figs?
0.078
2
Precision
degree of reproductability/uncertianty of the measurement
addition & subtraction with sig figs
count #s to the R of the decimal point- add normally and use the lowest # of sig figs on the left of the decimal ie
10.6871+ 1.42 = 12.11
Multiplication and division with sig figs
use lowest TOTAL number of sig figs ie
2.34*3.225= 7.55
Kilo
10_3m (to the third)
centi
10_-2
Milli
10_-3
Micro
10_-6
nano
10_-9
1 inch = ? cm
2.54
1 mile =? km
1.609
1 kg=? g
1000
1 kg=? g
1000
1g =?mg
10_3mg
1ug=?g
(ug=micrograms)
10_-6g
1mm=?m
10_-3m
1um=?m
10_-6m
1nm=?m
10_-9m
1mm=? decimeters
10 decimeters
100cm =?mm
1000mm
1L = ? dm
1 dm_3
1mL= ?cm
1 cm_3
1cc = ? m
10_-3 m_3
what is the freezing and boiling points for celceus?
freezing- 0
boiling- 100
what is the freezing and boiling points for ferinheight?
freezing- 32
boiling- 212
conversion factor for celcius to ferinheight
1/9/5 one over nine fifths
flip to convert to celcius
0 degrees kelvin =? celcius
273
absolute zero
0 degrees kelvin
10_3=?
1000
10_-3=?
0.001
x

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