Stoichiometry: Calculations with Chemical Formulas and Equations

 

60) 2C8H18(l) + 25O2(g) 16CO2(g) + 18H2O(g)

 

      (a) n = 0.750 mol C8H18 * 25 mol O2/2 mol C8H18 = 9.38 mol O2

      

      (b) m = 5.00 g C8H18 * 1 mol C8H18/114.26 g C8H18 * 25 mol O2/2 mol C8H18 * 32.00 g O2/1 mol O2 = 17.5 g O2

 

      (c) D = 0.692 g/mL          V = 1.00 gal

      

           m = 0.692 g C8H18/mL * 1.00 gal * 3.7854 L/1 gal * 103 mL/ L * 1 mol C8H18/114.26 g C8H18 * 25 mol O2/2 mol C8H18 * 32.00 g O2/1 mol O2

           m = 9.17 x 103 g O2