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Empirical Formula

Empirical Formula. Agenda Check % composition Review naming Review mole Town. 24.4% Ca, 17.1% N, 58.5% O 50.8% Zn, 16.1%P, 33.1%O 108.5 g Fe 404.6 lb Al. 3.9 g H 43.5 kg Ag 173.2 lb Pb 56.8 g H 2 O. % composition. Review Naming. Al 2 O 3 PbO 2 BCl 3 Ca +2 F - (NH 4 ) 3 PO 4

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Empirical Formula

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  1. Empirical Formula • Agenda • Check % composition • Review naming • Review mole Town

  2. 24.4% Ca, 17.1% N, 58.5% O 50.8% Zn, 16.1%P, 33.1%O 108.5 g Fe 404.6 lb Al 3.9 g H 43.5 kg Ag 173.2 lb Pb 56.8 g H2O % composition

  3. Review Naming • Al2O3 • PbO2 • BCl3 • Ca+2 • F- • (NH4)3PO4 • H2Cr2O7

  4. Mole Town

  5. % composition

  6. Empirical Formula Date:

  7. Empirical Formula • Definition: Most reduced formula; provides the ratio of one atom to an other. • Fe+2 and O-2

  8. Using % comp to find EF • Assume one has 100 g • Change %’s into grams • Convert g to moles using Mole Town • Divide by atomic mass • Divide all number of moles by the smallest • Provides ratio of one to another

  9. Determine the EF of a compound that is 30.4% N and 69.6% O.

  10. Determine the EF of a compound that is 17.5% Na, 39.7% Cr, and 42.8%O.

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