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Agenda

Agenda. Check EF Notes on MF Mole Project. Cu 2 O CH 2 O CH Fe 2 O 3 CuO. K 2 SO 4 HgO MgCl 2 BaCl 2 FeS. Empirical Formula Answers. Molecular Formula. Date:. Molecular Formula. A whole number multiple of the empirical formula CH 2. Method I.

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Agenda

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  1. Agenda • Check EF • Notes on MF • Mole Project

  2. Cu2O CH2O CH Fe2O3 CuO K2SO4 HgO MgCl2 BaCl2 FeS Empirical Formula Answers

  3. Molecular Formula Date:

  4. Molecular Formula • A whole number multiple of the empirical formula • CH2

  5. Method I • Multiply MM of MF by percent composition and divide by respective atomic masses. • Answer = subscript of MF

  6. Example • A compound is 40 % C, 6.7% H, and 53.3% O with a MM of 60.0g/mol. • C: 60.0 x 0.4/12 = 2 • H: • O: • What is the EF?

  7. Method II • Uses procedure learned with EF • Using same example from before

  8. Step I • A compound is 40 % C, 6.7% H, and 53.3% O with a MM of 60. • C: 40/12 = 3.3 • H: • O: • What is the EF.

  9. Step II-IV • Step II – find molar mass of EF. • Step III – Divide molar mass of MF by EF to get multiple. • Step IV – Multiply subscripts of EF by multiple to get MF.

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