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24 Cards in this Set

  • Front
  • Back
Matter that has a uniform and unchanging composition
Physical Property
Characteristic that can be observed or measured without changing the sample's composition(describes pure substances)
Extensive Properties
Dependent upon the amount of substance present
Intensive Properties
Independent of the amount of substance present
Chemical Property
Ability of a substance to combine with or change into one or more other substances
States of Matter
All matter that exists on Earth can be classified as one of these physical forms
Form of matter that has its own definite shape and volume
Form of matter that flows,has constant volume and takes the shape of its container
Form of matter that flows to conform to the shape of its container and fills the entire volume of its container
Gaseous state of a substance that is a solid or a liquid at room temperature
Physical Changes
Alter a substance without changing its composition
Chemical Change
A process that involves one or more substances changing into new substances
The Law of Conservation of Mass
States that mass is neither created nor destroyed during a chemical reaction-it is conserved....Mass(reactants)=Mass(products)
Combination of two or more pure substances in which each pure substance retains its individual chemical properties
Doesn't blend smotthly throughout and in which the individual substances remain distinct
Homogeneous Mixture
COnstant composition throughout; it always has a single phase
Technique that uses a porous barrier to separate a solid from a liquid
Separation technique that is based on differences in the boiling points of the substances involved
Separation technique that results in the formation of pure solid particles of a substance from a solution containing the dissolved substance
Technique that separates the components of a mixture (called the mobile phase) on the basis of the tendency of each to travel or to be drawn across the surface of another material (called the stationary phase)
Pure substance that cannot be separated into simpler substances by physical or chemical means
Combination of two or more different elements that are combined chemically
Law of definite proportions
States that regardless of the amount, a compound is always composed of the same elements in the same proportion by mass
Law of multiple proportions
States that when different compounds are formed by a combination of the same elements, different masses of one element combine with the same relative mass of the other element in a ratio of small whole numbers