Chem H General Info (UNIT 2)
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Last updated 5:23 PM on 6/3/23
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8 Terms
1
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standard SI units
meter
kilogram
second
mole
kilogram
second
mole
2
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derived SI units (combinations of the standard units)
volume: m^3 or liter
density: g/mL or kg/m^3
molar mass: g/mol
concentration: mol/L
density: g/mL or kg/m^3
molar mass: g/mol
concentration: mol/L
3
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conversions within the SI system
“Kilo-”: 10^3
Base: not a prefix, 10^0
“Centi-” 10^-2
“Milli-”: 10^-3
Base: not a prefix, 10^0
“Centi-” 10^-2
“Milli-”: 10^-3
4
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conversions between systems
1\.00 cm^3 = 1.00 mL
1\.00 L = 1x10^-3 m^3
1\.00 L = 1x10^-3 m^3
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calculation of percent error
|accepted - obtained/ accepted| \*100
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significant figures
addition/subtraction: number with the least number of values AFTER THE DECIMAL determines the number of sig figs in the answer
multiplication/division: the number of sig figs is determined by the value that has the least number of sig figs, regardless of the decimal
multiplication/division: the number of sig figs is determined by the value that has the least number of sig figs, regardless of the decimal
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direct proportionality
gives a straight line
8
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indirect proportionality
gives a curve