Ishwar S. answered • 01/15/19
Tutor
5
(7)
University Professor - General and Organic Chemistry
Write the balanced chemical reaction between octane and oxygen.
2 C8H18 + 25 O2 → 16 CO2 + 18 H2O
Use stoichiometry to convert 11.0 g of C8H18 to g of O2. Mole ratio of C8H18 to O2 is 2:25. Molar mass of C8H18 is 114.23 g/mol and O2 is 32.00 g/mol.
11.0 g C8H18 x (1 mol C8H18 / 114.23 g C8H18) x (25 mol O2 / 2 mol C8H18) x (32.00 g O2 / 1 mol O2) = 38.5 g O2 needed
