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How many grams of C2H5OH are used up when 6.25 grams of O2 react according to the following equation?

C2H5OH + 3O2 ---> 2CO2 + 3H2O

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mols O2 = grams/molar mass = ?
mols O2 x 1/3 = mols C2H5OH used because the equation tells you 1 mol C2H5OH = 3 mols O2.
grams C2H5OH = mols x molar mass = ?

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