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
Kilogram
Second
Ampere
Kelvin
Candela
Mole

1) m -length
2) kg -mass
3) s -time
4) A -electric current
5) K -thermodynamic temp
6) cd -luminous intensity
7) mol -amt of substance
G
M
K
D
C
M
M
N
P
fill out! powers & prefix
Giga = 10^9
Mega = 10^6
Kilo = 10^3
Deci = 10^-1
Centi = 10^-2
Milli = 10^-3
Micro = 10^-6
Nano = 10^-9
Pico = 10^-12
What is absolute zero?
when there is no kinetic enery at the atomic/molecular level