2.
Law of Conservation of Matter <ul><li>“ Matter is neither created nor destroyed, only changed from one form to another.” </li></ul>
3.
LCM continued <ul><li>Every reaction that takes place in nature or in the laboratory must have the same number of atoms on both sides of the equation, or is BALANCED! </li></ul>
4.
ANATOMY OF AN EQUATION <ul><li>Letter in parenthesis tells state of matter </li></ul><ul><li>notice H and O with their subscripts… </li></ul><ul><li>why??? </li></ul>H 2 (g) + O 2 (g) H 2 O(l) reactants yield products
5.
DIATOMIC ELEMENTS <ul><li>In nature, diatomic elements contain two atoms bonded together, hence di- prefix. </li></ul><ul><li>When written by themselves , always get a subscript 2. </li></ul><ul><li>Which ones are diatomic??? </li></ul>
7.
BALANCING EQUATIONS <ul><li>Atom inventory of the whole equation </li></ul><ul><li>Balance atoms by adding coefficients! </li></ul><ul><li>You cannot add or change subscripts!!! </li></ul>RULES: (1) save O and H till the end (2) use least common multiple to get numbers equal (3) start with oddest combination or biggest difference
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