# chemistry

what mass of oxygen would be required to completely burn 6.75 g of propane in the following reaction?

C3H8+5O2 => 3CO2+4H2O

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1. Here is a worked example of a stoichiometry problem.
http://www.jiskha.com/science/chemistry/stoichiometry.html

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propane (c3h8) is burned in oxygen to produce carbon dioxide and water. The heat of combustion of propane is -2012 kJ/mole. How much heat is given off when 3.0 mol C3H8 are react with 10.0 mol O2? Thanks, and please if possible