Lecture 7 Notes - Involves rearrangement and exchange of...

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Lecture 7 Notes Empirical formula o the simplest whole-number ratio of atoms in a molecule is called the empirical formula. o Determined from percent composition or combining masses C 74.03% . * . = . 74 03 112 01 6 164 H 8.70% . * . = . 8 70 11 01 8 61 N 17.27% . * . = . 17 27 114 01 1 233 Molar Mass=162.23 g/mol C 4.999 H 6.98 N C 5 H 7 N Chapter 7 o Balancing chemical equations 2H 2 + O 2 2H 2 O 4 + 32 36 o Chemical reaction Change of one or more substances into new ones
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Unformatted text preview: Involves rearrangement and exchange of atoms to produce new molecules Reactant produce o Evidence of chemical reaction Visual clues: color changes, gas bubbles, etc. Other clues: new odor or state o + → + 2Als Fe2O3 Al2O3s 2Fel + = reacts with (s)= solid (l)=liquid (g)=gas (aq)=aqueous o...
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