CHEM 121 Lecture Notes - Lecture 1: Metric Prefix, International System Of Units, Distillation
15 Nov 2016
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Atomic and molecular perspective: matter, properties, elements, atoms, molecules, macroscopic vs. submicroscopic (nanoscopic) Classifications of matter: classified by state: solid, liquid, gas, classified by composition. Properties of matter: types of properties. Physical- used to separate mixtures: ways to separate: Filtration- solid substances are separated from liquids and solutions. Distillation- uses differences in boiling points of substances to separate a homogeneous mixture into its components. Chromatography- separates substances based on differences in solubility in a solvent. Inform action: notice patterns and trends, formulate and test hypotheses, develop theory, repeat, scientific law: a concise verbal statement. Units of measurement: quantitative properties, science uses the metric system, si units in book, si prefixes in book (giga pico, length (m) and mass (g, temperature scales: Celcius- water freezes at 0 and boils at 100. Kelvin- same degree size, but water freezes at 273: derived units- a combination of units. Chapter 1: volume- l x w x h.
