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Find how many grams of oxygen

1. In the following problem, first find how many grams of oxygen would be used to completely react with 230 grams of pentyl alcohol (C5H11OH)?

How many grams of oxygen would be used? See attached file for full problem description.

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Please see the attached file.

1. Rewrite and balance the reaction:
C5H11OH + 7.5O2 = 5CO2 + 6H2O

MW (C5H11OH) = 5*12+12+16 = 88 (g/mol)
MW (O2) = 32 (g/mol)
MW (H2O) = 18 (g/mol)

According to reaction balance, 1 mol of C5H11OH reacts with 7.5 mol of O2.
Number of mole of C5H11OH = 230/88 = 2.61 (mol)
Thus number of mole of O2 required = 2.61*7.5 = ...

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