Answer: Propane is c3h8 and oxygen gas is O2
Explanation: make sure equation is balanced and There are 3 carbons in the reactants, and 3 carbons in the products also There are 8 hydrogens in the reactants and 8 hydrogens in the products even though There are 10 oxygens in the reactants and 10 oxygens in the product its already balanced so therefore you then need to convert the amount of moles of oxygen to the number of moles of propane to get your answer