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Study Guide

CHE 201- Midterm Exam Guide - Comprehensive Notes for the exam ( 12 pages long!)

12 Pages

Course Code
CHE 201
Michael Aucott

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[CHE 201] Comprehensive Fall guide including any lecture notes, textbook notes and exam guides.find more resources at Chapter 1 Chemistry • Central science; understanding it can facilitate the understanding of other sciences. • The study of matter and the changes it undergoes Scientific method • Systematic approach to experimentation Matter • Anything with mass that occupies space • Classification of matter 1. Substance ▪ Form of matter with a constant composition and distinct properties ▪ Can be elements or compounds • Elements o Ca▯’t ▯e separated into simpler substances by any chemical means (indivisible) • Elements form compounds (fixed/same composition) o Elements COMBINE together to form compounds; these elements are called constituent elements o Substance composed of atoms of 2 or more elements chemically united in fixed proportions. o Ex, water H20. o Co▯pou▯ds ▯a▯’t ▯e separated ▯y a▯y physi▯al properties (▯oili▯g, freezi▯g, filtering); only by chemical reactions. 2. Mixtures ▪ 2 or more substances that retain their distinct properties. ▪ Do▯’t have a ▯o▯sta▯t ▯o▯positio▯. ▪ Homogenous mixture (solutions): same and uniform; ex, milk, soda. ▪ Heterogeneous mixture: not uniform, visible distinction; ex, sand & iron. ▪ Mixtures can be separated by physical means. o States of matter ▪ Solid & liquid: condensed phases- molecules are close to each other, little motion. ▪ Liquid Gas: fluids- molecules are far apart find more resources at
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