C3h8+ 502, yields 3c02, + 4H2O How many moles of oxygen are necessary to read completely with 16 moles of propane?

i wish i could but this one is weird give me abc and i can solve it.

chemical changes occur when a substance combines with another to form a new substance, called chemical synthesis or, alternatively, chemical decomposition into two or more different substances. these processes are called chemical reactions and, in general, are not reversible except by further chemical reactions. some reactions produce heat and are called exothermic reactions and others may require heat to enable the reaction to occur, which are called endothermic reactions. understanding chemical changes is a major part of the science of chemistry.