chem2.pdf ECON 2010
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This 3 page Study Guide was uploaded by Jalen Williams on Saturday October 3, 2015. The Study Guide belongs to ECON 2010 at University of South Carolina Aiken taught by in Fall 2015. Since its upload, it has received 43 views. For similar materials see Principles of Economics: Microeconomics in Economcs at University of South Carolina Aiken.
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Date Created: 10/03/15
Physical Properties characteristic observed or measured wo changing the identify of s substance Shape physical state boiling and freezing points density an colon of that substance For exam a penny is round has an has a copper color a has a shinny luster Summary of the scientific method obsrvation Hypothesis experiments Theory Chemical properties descibe the ability of a substance To interact with other substancees To change into a new substances Chemical change chemicals are substances that always have the same composition and properties Things are made from chemicals Soup and lotions Toothpaste Cosmetics Clothes Chemical change is any change that results in the formation of new chemical substances At the molecular level chemical changeinvolves making or breaking of bonds between atoms These changes are chemical iron Physical Changes occur when matter undergoes a physical change of state but its composition remains constant water exists in three states ice water and steam Solve for a variableTf 18 tc tf32 18tc 18 18 tfi c 18 Calculating percentaae To determine a o divide the parts by the total whole and multiply by 100 X 10000 totawhoe Given 20 coins if 5 are pennies what o of the coins are pennies 5 pennies x 100 o 25 pennies 20 coins Pure Substances compounds two or more elements chemically combined can be separated using chemically methods Elements cannot be brown down further using physical or chemicals methods Heterogeneous mixture the composition varies from one part of the mixture to another the diff parts of the the mixture are visible Homogenous mixture the composition is uniform throughout the sample The diff part of the mixture not visible Mixtures the type of matter that consist of 2 or gt substances that are mixed but not combined Two or more substances in different proportions that can be separated by physical methods Observation Jalen came to my house an started to sneeze he noticed i had a cat Hypothesis jalen is allergic to cats Experiment to test your hypothesis You leave your friends house if its true he doesn39t stop if its true he stops Theory the experimental results indicate that is jalen is allergic to cats Density mass volume JJ THompson electrons Ernest Rutherford protons James Chadwick neutrons an element that is composed of just one type of atom a compound that is composed of two or more elements chemically combined in the same proportion
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