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Empirical and Molecular Formulas

Empirical and Molecular Formulas. Empirical Formula. The simplest, whole number ratio of elements in a compound. It’s the reduced chemical formula. examples : benzene C 6 H 6 molecular form. CH water H 2 O molecular form. H 2 O

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Empirical and Molecular Formulas

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  1. Empirical and Molecular Formulas

  2. Empirical Formula • The simplest, whole number ratio of elements in a compound. • It’s the reduced chemical formula. • examples: benzene C6H6 molecular form. CH water H2O molecular form. H2O • The empirical formula CAN be the same as a molecular formula. empirical formula empirical formula

  3. Molecular Formula • The ACTUAL number of atoms of each element in a compound. examples: glucose C6H12O6 molecular formula CH2O empirical formula 6:12:6 reduces to 1:2:1 peroxide H2O2 molecular formula HO empirical formula 2:2 reduces to 1:1

  4. Empirical or Molecular Formula? • Dinitrogen tetroxide N2O4 ______________ The empirical formula would be_________ • BH3 _________________________ • Tetraphosphorus decoxide P4O10 _____________ The empirical formula would be __________. molecular NO2 molecular AND empirical molecular P2O5

  5. Molecular Formula • The molar mass for the molecular formula will be given. • Go through steps to get the empirical formula: % to grams, grams to moles, divide by smallest, multiply till whole • Then get the GFM for the empirical formula. • FIND n • Multiply each subscript in the emp. Formula by “n”

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