Card Set Information
chemistry semesters review
A characteristic that can be observed or measured without changing the sample's composition.
: independent of the amount os subtstance (density, scent).
: dependent on the amount of substance present (length, volume, mass).
The ability of a substance to combine with or change into one or more other substances (iron forming rust when combines with the oxygen in air).
A change which alters a substance without changing its composition.
: a transition of matter from one state to another (physical change).
*condensation, solidification, melting and boiling points, porosity, stability.
A process that involves one or more substances changing into new substances
: starting substances
: are the new subtances formed
*decompose, explode, rust, oxidize, corrode, tarnish, ferment, burn, rot.
Observations that suggest a chemical change occurred:
Production of gas, bubbles, odor
Release or absorption of energy
Change of temperature
Giving off light
Change in color
Formation of a precipitate
Law of conservation of mass:
During a chemical reaction the mass of products is equal to te mass of the reactants.
Are the simplest form of matter that has its unique set of properties
a substance that contains two or more elements chemically combined in a fixed proportion.
A physical blend of two or more componens.
: Composition os uniform/ solution. (water, tea, liquids)
: it wis not uniform (pizza, salad)
Have fixed composition.
: zinc and copper
: ion and chromium
: is an alloy
: is an alloy
: gold and other metals