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Chem - test 1

QuestionAnswer
Two Broad Catagories of Matter Pure Substances and Mixtures
Pure Substances are: a single element or a single compound
A mixture is: -Two or more substances that are physically mixed, not chemically combined -Two or more substances in different proportions
Homogeneous Mixture a solution = uniform distribution of the components (solvents and solutes) throughout the mixture.
Heterogeneous Mixture non-uniform or variable distribution of components throughout the mixture.
extensive property property that depends on the amount of matter (ie. mass)
intensive property property that does not depend on the amount of matter (ie. density, temperature)
theory unifying principle that explains a body of experimental observations
law concise, verbal or mathematical statement of a reliable relationship between phenomena
Accuracy how close a measurement is to the true value of the property being measured.
Precision repeatability of the measurement
Dalton's atomic theory - Matter is composed of atoms. - All atoms of a given element are identical to one another - Atoms of two or more different elements combine in simple ratios to form compounds. - A chemical reaction involves changes in the arrangements of atoms.
Created by: 1423555193