NSCI 1321 Study Guide - Midterm Guide: Molar Mass, Weighted Arithmetic Mean, Carbon-12
10 Sep 2015
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Scientific method: define the problem, perform the experiment, interpretation. Hypothesis: tentative explanation for the data and observations made. Ionic liquid: salts that are liquid at room temp. Law: brief statement of relationship between phenomena that is always the same under the same conditions. Theory: unifying principle that explains a body of facts/lawsthe best explanation of what is happening up to this point. Chemistry: the study of matter and how is changes. Matter: anything that occupies space and has mass. Substance: matter with definite composition and distinct properties. Mixture: combination of 2 or more substances that retain their distinct identities and can be separated by physical means. Compound: substance composed of atoms of 2 or more elements chemically united in fixed proportions can only be broken by chemical means. Physical change: doesn"t alter physical composition or identity of a substance (melting ice) Extensive property: a property that depends on the amount of matter (mass, length, volume)
