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Calculate the mass of CO2 produced from the complete combustion

  1. Sep 20, 2009 #1
    1. The problem statement, all variables and given/known data
    Gasoline consists primarily of octane, C8H18

    Calculate the mass of CO2 produced from the complete combustion of 3.79 L (1.00 gallon) of gasoline (assume octane, density = 0.756 g/mL) with excess O2

    3. The attempt at a solution
    The balanced chemical formula would be:

    2C8H18 + 25O2 [tex]\rightarrow[/tex] 16CO2 + 18H2O

    For my work:

    [tex] 3790mL (octane)* \frac{0.756g(octane))}{mL} * \frac{1 mol (octane)}{114.144g (octane)} * \frac{8 mol (CO_2)}{1 mol (octane)} * \frac {44.00g CO_2}{1 mol CO_2} [/tex]

    [tex] = 8835.8957g CO_2 [/tex]

    Is it correct? What about significant figures?
     
    Last edited: Sep 20, 2009
  2. jcsd
  3. Sep 20, 2009 #2
    Re: Stoich

    Looks correct. Since you start with a number with 3 significant figures and use a conversion factor with 3 sig figs, use three in your answer.
     
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