>>44
Sorry man, but that violates the laws of conservation of energy. You can't get less stuff out than what you put in. It all had to go somewhere. In other words, when your reactant is gone, you will be left with product, and a probable change in energy, assuming a closed system. The ratio of reactant to product is a quantitative number describing the amount of reactant needed to produce an amount of product. If you had no reactant, then you'd have no product. n/0 in this case doesn't make sense.
But that's what this is about, making sense. The sad fact is there is no known concept in which n/0 makes sense in a physical way, and in a theoretical way it is worked around or avoided as it makes no sense there either. Until some phenomena exists where a ratio to nothing is desirable, it will continue to be avoided.