Test Chp 1-3 Models and Measurements Flashcards
(22 cards)
Chemistry is
the study of matter, substance, and model
Qualitative Data is
data that has something describing it
Quantitative Data is
data that uses a number
Ladder Method prefixs are…
King (Kilo) Henery (Hecto) Died (Deka) By (Base) Drinking (Deci) Chocolate (Centi) Milk (Milli)
Accuracy
How close the data is to the desired goal or “true” value
Precision
How consistant is the data?
What is accuracy equation?
accepted-measured/accepted x 100
What is percent precision equation
range/2/average x 100
Pure substance
A substance that contains a single type of atom
Mixture
A substance that contains more than one type of particle
Element
Contains a single type of atome
Falls under pure substance
Compound
Contains more than one element chemically bonded too form molecule
Pure substance
Homogenous Mixture
A mixture with an even distrubtion of particles
Mixture
Heterogeneous Mixtures
A uneven distubition of particles
Mixture
Physical Properties
Can be used to identify a substance: can be observered/measured without changing chemically identy
Physical Properties examples
Density, Melting Point, Boiling Point, Solibility
Chemical Properties
How one substance chemically reacts to another
Matter
Anything that has mass and takes up space
Mass
A measurement of the amount of matter
Volume
A measurement of the space the matter occupies
Density
Mass and volume put together the amount of mass in a given model
Density Equation
Mass/ volume
