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College Chemistry Week 1 Partial Notes!

by: Tiffani Marie

College Chemistry Week 1 Partial Notes! CHMY 141

Marketplace > Montana State University > Chemistry > CHMY 141 > College Chemistry Week 1 Partial Notes
Tiffani Marie
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About this Document

Chemistry notes for week 1 on matter and the scientific method, This will be updated though out the week as the lesson progresses.
College Chemistry I
Bahn, Christian S
Class Notes
Chemistry, matter, Substances, Mixtures, homogeous, heterogenous, Scientificmethod, compounds, elements




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This 2 page Class Notes was uploaded by Tiffani Marie on Tuesday August 30, 2016. The Class Notes belongs to CHMY 141 at Montana State University taught by Bahn, Christian S in Fall 2016. Since its upload, it has received 108 views. For similar materials see College Chemistry I in Chemistry at Montana State University.

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Date Created: 08/30/16
Week 1 8/30/2016 Chemistry is considered to be the central science behind the question. Chemistry involves the  study of matter and its transformations. Matter  Matter is “stuff” matter is anything having mass or that takes up space. Most matter is  easily identifiable in categories such as solid, liquid, or some not as easily identified  gases such as air, CO, CO2, and H2S. During any type of physical or chemical  transformation the total mass of the matter involved cannot change.   Matter can be divided in to mixtures and pure substances.  o Pure substances then can be divided in to elements and compounds.   Elements consist of one type of atom and are given an elemental symbol  such as gold.   Compounds however, are classified as two or more types of atoms that are bonded and have a composition given by a formula like water – H2O.  Molecules are the simplest form of a compound, unlike an element where  the simplest from are atoms (multiple bonded molecules). o  Mixtures can be divided in to two categories, either Homogeneous or  Heterogeneous.   Homogeneous mixtures have the same composition throughout the  sample.   Heterogeneous mixtures have different composition throughout the  sample, if you can visibly tell a difference it is heterogeneous.   In order for atoms to bond there must be a chemical reaction otherwise you just have two  pure substances. Identifying Types of Substances and Mixtures  Are pure substances separable into simpler substances?   If yes, it is a compound.  An example of a compound would be substance would  be water.  If no, it is an element. An example of an element would be Helium.  Is the mixture uniform throughout?   If yes, the mixture in homogeneous. Things like tea and sugar mix thoroughly and distribute evenly making it one homogenous mixture.    If not, the mixture is heterogeneous. something like wet sand has two different  types of particles that separate into distinct regions (i.e. The sand and the water).  The Scientific Method The Scientific Method is a never ending cycle of constant testing, observing, and refining  scientific laws. 1. Begins with an observation or a question 2. A hypothesis is created based on observations 3. Hypothesis is tested repeatedly to confirm theory or present a new hypothesis 4. A series of confirmed hypotheses lead to the creation of a scientific law


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