Chapter2:analyzing data Flashcards
When does water boil on kelvin scale
373
when does water freeze in kelvin scale
273
Celsius boiling point
100
celsius freezing point
0
fahrenheit boiling
212
fahrenheit freezing
32
Celsius to kelvin
k=c+273.15
fahrenheit to c
c=5/9(f-32)
How to find density
v=l x w x h
or water displacement
conversion factors
a ratio of 2 quantities that have different units
accuracy def
how close are you to the real value
recision def
how repeatable the measurements are
percent error
(experimental-actual)/actual=x
x times 100
measurement def
quantitative observation consisting of 2 parts
number and unit
sig fig rules
non zero integers always count
leading 0s to non zeros do not count
captive zeros count
trailing 0s count if there is a decimal
Scientific notation
positive exponant= big number
negative exponant= small number
how to seperat mixtures
filter distilation -if the two substances have different boiling points crystalization suplimation chromotogrophy
Law of definate properties
compounds contain the exact same properties regardless of sample size or source
law of multiple proportions
when multiple compounds are formed between 2 elements, the rations of the masses of each element in each compound will be whole numbers or multiples of eachother
law of conservation of mass
mass does not change during a chemical reaction
