Classifying Matter
Properties
Scientific Notation
Sig Figs
SI Units
100
Definition of a Mixture
combination of substances
100
purely descriptive qualities
qualitative properties
100
Where is the decimal located in proper scientific notation?
After the first digit.
ex. 3.4x10^3
100
How many sig figs are in 2.0889000?
8
100
Length unit
meter (m)
200
Define pure substance
a sample of matter having the same chemical and physical properties throughout
200
Definition of Physical Properties
descriptions of matter as it exists
characteristic that can be measured or observed without change of identity.
200
True or False
The first digit in scientific notation can NOT be a zero?
True
200
sig figs? 89000. vs 89000
5 sig figs
2 sig figs
200
Amount
mole (mol)
300
Definition of an element
Cannot be broken down into simpler substances by ordinary chemical processes.
300
How matter changes in the presence of other matter or energy?
Chemical Property
300
7891037 to scientific notation
7.891037 x 10^6
300
What is the measurement to the correct number of significant digits?
3.58
300
Energy (this is a derived unit)
Joule
400
combined so finely, can't tell easily that it is a mixture
Homogeneous Mixture
400
What kind of property:
Fluorine reacts easily
chemical
400
0.00000267 to scientific notation
2.67 x 10^-6
400
36.5
400
Mass
Kilogram (kg)
500
Can be reduced to simpler substances by ordinary processes
compounds
500
CO changes from solid to a liquid at -205°C
Chemical or physical property?
physical
500
0.50000378
5.0000378 x 10^-1
500
See pic from desktop
1.5 (the 5 is estimated!)
500
Temperature
What is the temperature of 5 Degrees Celsius in Kelvin
Kelvin (K)
278.15K