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Simplest004 Simplest004 Presentation Transcript

  • Simplest Formula
    Prepared by: Stephen Boylan
    October 20, 2009
  • Simplest Formula .
    .
    .
  • Simplest Formula - Simple001
    A. Combustion in Excess oxygen
    12.795 g. HC ----> 32.689 g. CO2 + 13.377 g. H2O
    B. 5 Step Calculation
    C. The Simplest Formula
    . Cx Hy Oz
  • Molar Mass CO2
    Element Number Atomic Mass Formula
    n Units, amu Mass,
    C 1 12.01 12.01
    O 2 16.00 32.00
    44.01grams per mole CO2
    • Molar Mass H2O
    •  
    • Element Number Atomic Mass Formula
    • n Units, amu Mass, n(amu)
    • H 2 1.008 2.016
    •  
    • O 1 16.00 16.00
    • 18.02 grams per
    • mole H2O
    •  
    •  
    • 2.0 Calculate the grams of carbon, hydrogen and oxygen.
    •  
    • 12.795g. HC --> 32.689 g CO2 + 13.377 g. H2O
    • C:
    • 32.689 grams CO2 12.01 grams C = 8.921 g. C
    • 44.01 grams CO2
    • H:
    • 13.377 grams H2O 2x1.008 grams H = 1.497 g H
    • 18.02 grams H2O
    • O:
    • 12.795 g HC - 8.921g C - 1.497 g H= 2.377 g O
    •  
    • Moles of carbon, hydrogen and oxygen.
    •  
    • C: 8.921 g. C 1 mole C = 0.7429 moles C
    • 12.01 grams C
    •  
    • H: 1.497 g. H 1 mole H = 1.485 mole H
    • 1.008 grams H
    •  
    •  
    • O: 2.377 g. O 1 mole O = 0.1485 mole O
    • 16.00 grams O
    • Ratios Divide by smallest
    •  
    • C: 0.7429 moles C 1 = 5.003 ~ 5 moles C
    • 0.1485
    • H: 1.485 mole H 1 = 10 moles H
    • 0.1485
    • O: 0.1485 mole O 1 = 1 moles O
    • 0.1485
    •  
  • C5 H10 O1
  •  
    The End