J.R. S. answered • 09/12/22
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The combustion of octane (C8H18) with oxygen (O2) produces carbon dioxide (CO2) and water (H2O)
2 C8H18 + 25 O2 ==> 16 CO2 + 18 H2O ... balanced equation
Molar mass C8H18 = 114 g / mol
Molar mass O2 = 32 g / mol
Using dimensional analysis and the stoichiometry of the balanced equation, we have ...
14.0 g C8H18 x 1 mol C8H18 / 114 g x 25 mol O2 / 2 mol C8H18 x 32 g O2 / mol O2 = 49.1 g O2 needed
