## Chemisty III

 Base Unit
 defined unit in a system of measurement. it is independent of other units
 Second
 SI base unit for time
 Meter
 SI baseunit for length
 What is a kilogram?
 SI base unit for mass
 What are three different types of temperature?
 Celsius, Fahrenheit, and Kelvin.
 How do you convert temps?
 1.8(?F) + 32 = ? or K = C + 273
 What is a derived unit?
 unit defined by a combination of base units
 What is a liter?
 metric unit for volumn. equal to one cubic decimeter
 What is density? what is the equation?
 density = mass/volumn
 What is scentific notation?
 10 to the 3…. etc
 Practice Scientific Notation Problems on page 43
 What is deminsional analysis?
 problem solving that uses conversion factors to get an answer
 What is a conversion factor?
 ratio of equivalent values to express the same quantity but in diff units;
 Practice conversion factors on page 44 and 45
 What is accuracy?
 refers to how close a measured value is to an accepted value
 What is precision?
 series of meaurements in reference to one anothr
 What is error?
 difference between an accepted value and experimental value
 What is percent error?
 ratio error to accepted value
 Practice significant figures on page 51
 What is a graph?
 visual display of data
 Where do indepentant and dependent variables go on a graph?
 blah vs. halb blah goes on left, halb goes on the bottom
 What is interpolation?
 already given information on a graph there is no predicting
 What is extrapolation?
 all predicting, 50/50 guesses
 Give Symbol and Quantity: Meter KilogramSecondAmpereKelvinCandelaMole
 1) m -length2) kg -mass3) s -time4) A -electric current5) K -thermodynamic temp6) cd -luminous intensity7) mol -amt of substance
 GMKDCMMNPfill out! powers & prefix
 Giga = 10^9Mega = 10^6Kilo = 10^3Deci = 10^-1Centi = 10^-2Milli = 10^-3Micro = 10^-6Nano = 10^-9Pico = 10^-12
 What is absolute zero?
 when there is no kinetic enery at the atomic/molecular level
x

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