Gas stoichiometry.
Ethanol (C2H5OH ) burns in air:
C2H5OH (I) + O2(g) ----> CO2(g) + H2O (I)
Balance the equation and determine the volume of air in liters at 35.0 degrees C and 790 mmHg required to burn 227 g of ethanol. Suppose that air is 21.0 percent O2 by volume.