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25 terms

Chemistry Review 1

STUDY
PLAY
vapor
gaseous state of something that is usually a gas/solid (steam)
gas
Matter that glows to conform to shape of container and fills entire volume. Easily compressible.
matter
Pure substances and mixtures are all ________.
mixtures
________ retain individual properties of the components.
mixtures
EX: Saltwater = still salty and watery
heterogeneous
Looks different throughout, layered, see individual components.
heterogeneous
EX: Sand and water
homogeneous
Looks the same throughout and cannot see individual components.
homogeneous
Also called solutions.
aqueous
_________ solutions contain water.
alloy
Solid + Solid = ?
alloy
Mixture of 2 or more metals.
Separating mixtures
Physical, settling, chromotography, filtration, distillation, different melting points, magnetic properties.
settling
Let the gravity separate mixtures for you (EX: density)
distillation
Separation based on boiling point differences in which substances with lower boiling point vaporizes first.
element
A pure substance that CANNOT be broken down by chemical or physical means.
compound
A pure substance by CAN be chemically broken down.
solution
a homogeneous mixture
heterogeneous
If ___________, must be a mixture.
made
Compounds are always ________ the same.
(EX: Water- H2O)
mass
Compounds always have the same _______.
precision
How reproductable (repeatable), or how constantly that measurement is made.
range
Smaller _______ = more precise.
accuracy
How close to the correct (accepted) value.
average
To compare accuracy, compare the ________ to the accepted value.